• Is it possible: Ion Bomb

    Updated: 2010-07-31 17:51:53
    I design weapons for fun and have just heard of an ion bomb. First off is It even possible to use ions to make a destructive device?

  • Schwarzschild solution without matter

    Updated: 2010-07-31 17:28:12
    Is it theoretically possible that the metric in the whole universe would be described by Kruskal extension of Schwarzschild solution of Einstein equation and in the universe would be no matter at...

  • Why I am REALLY disappointed about string theory

    Updated: 2010-07-31 17:16:35
    I think it's time to write a short essay why I am really disappointed about string theory. It is not because ST is wrong (we don't know if it is wrong; and we have no proof that other theories...

  • How is quantum entanglement observed?

    Updated: 2010-07-31 16:57:39
    Any measurement device used to witness the phenomenom seems like it would disrupt quantum entanglement. How do scientists manage to observe it?

  • Cross section at high energies.

    Updated: 2010-07-31 15:51:06
    Hello guys. I have one question: The cross section for several processes rises with increasing energy. That is the case at high energies. I also know that this increase can not be observed in the...

  • Origin of Attractive Electron Interaction

    Updated: 2010-07-31 15:48:41
    I have started to learn BCS theory and I am not been able to find a derivation of the effective attractive electron-electron interaction which is assumed to explain the Cooper pairing. Can anyone...

  • California is the primary US stop for LHC's ALICE data

    Updated: 2010-07-31 00:10:01
    For approximately one month a year, the nuclei of lead atoms traveling near the speed of light will collide in the Large Hadron Collider's (LHC) ALICE experiment, generating a fireball about 100,000 times hotter than the core of our Sun. At these temperatures protons and neutrons dissolve into a "particle soup" of quarks and gluons, known as the quark-gluon plasma -- a state of matter that first occurred in nature at the birth of our Universe almost 14 billion years ago, a few millionths of a second after the Big Bang. By watching this "soup" cool, physicists hope to better understand the nature of matter, which makes up everything from galaxies to humans.

  • Mass generation and supersymmetry

    Updated: 2010-07-30 20:30:16
    I have uploaded a paper on arxiv with a new theorem of mine. I have already exposed the idea in this

  • A slide that captures the future(s) of particle physics

    Updated: 2010-07-30 18:33:19
    Of the estimated 10,000 slides shown at the International Conference on High Energy Physics, a few stand out as likely to stick around for a while. One may be the first slide ever that lists all possible future projects in high-energy physics around the world, along with their states of readiness.

  • Suzy at Last?

    Updated: 2010-07-30 10:56:32
    The first time I went to a lecture on supersymmetry the auditorium was so packed that many people co

  • US LHC Blog Right now Trying to collide 25×25 bunches

    Updated: 2010-07-30 04:30:38
    : Follow us : on US LHC Blogs Home Right now : Trying to collide 25×25 bunches Posted by Mike Anderson on 29 Jul 2010 at 02:20 pm As we speak there are 25 bunches of protons in both proton beams in the LHC . See all those steps in the graph red and blue lines Each little step is one bunch being added , and each big” step is 4 bunches being added . So if you count the steps yourself you should get a total bunch count of 25 in each beam . The red and blue lines correspond to the left-hand y-axis showing . Intensity” The energy of the proton beams is in black and goes with the right-hand y-axis , Energy GeV As I write this the protons are around 500-some GeV and being ramped up to 3500 GeV which should take about half an . hour Once both beams are at 3500 GeV and they declare stable beams ,

  • Share bookmark email Right now Trying to collide 25×25 bunches AddToAny

    Updated: 2010-07-30 04:30:37
    , , : Preferences Get the button Share Bookmark Right now : Trying to collide 25×25 bunches : URL Email Facebook Digg MySpace Windows Live Favorites Bebo Google Reader Evernote Strands Google Gmail AOL Mail Expression SmakNews Yahoo Messenger Blogger Post Mixx Shoutwire Windows Live Spaces Instapaper Netvouz BibSonomy StartAid Meneame Technotizie FriendFeed Squidoo Faves Segnalo Slashdot Jamespot LinkaGoGo Hugg Propeller Current Yample Simpy Ask.com MyStuff Wists MyLinkVault DZone Sphere Symbaloo Feeds Folkd Amazon Wish List Email program Twitter Google Bookmarks Reddit StumbleUpon Mister-Wong Orkut Netvibes Share Posterous Yahoo Mail MSDN Arto Plurk Identi.ca TypePad Post Netlog CiteULike Hemidemi PhoneFavs Wink BlogMarks Kledy Yoolink NewsVine Plaxo Pulse Protopage Bookmarks YiGG Pusha

  • US LHC Blog Right now Trying to collide 25×25 bunches

    Updated: 2010-07-30 04:30:35
    : Follow us : on US LHC Blogs Home Right now : Trying to collide 25×25 bunches Posted by Mike Anderson on 29 Jul 2010 at 02:20 pm As we speak there are 25 bunches of protons in both proton beams in the LHC . See all those steps in the graph red and blue lines Each little step is one bunch being added , and each big” step is 4 bunches being added . So if you count the steps yourself you should get a total bunch count of 25 in each beam . The red and blue lines correspond to the left-hand y-axis showing . Intensity” The energy of the proton beams is in black and goes with the right-hand y-axis , Energy GeV As I write this the protons are around 500-some GeV and being ramped up to 3500 GeV which should take about half an . hour Once both beams are at 3500 GeV and they declare stable beams ,

  • Are you the center of the Universe?

    Updated: 2010-07-29 18:27:05
    One topic which generated a lot of discussion at the Gravity and Cosmology meeting was the void model of the Universe. The basic argument is simple: the dark energy is an ugly addition to our cosmological standard model, with 70% of the energy density of the Universe some mysterious substance with weird properties. From a [...]

  • From early particle accelerators to the LHC in 12 minutes

    Updated: 2010-07-28 23:00:10
    Check out a 12-minute public television program that traces the invention of the cyclotron in Berkeley in the 1930s, the development of SLAC's two-mile-long linear accelerator in the 60s, and how they relate to what's going on at the Large Hadron Collider.

  • Lighting up the dark universe

    Updated: 2010-07-28 19:43:27
    Exploring our dark universe is usually the domain of extreme physics. Clues to dark matter and energy are searched for by huge neutrino telescopes and particle detectors, deep underground, and by experiments launched into space. But an experiment doesn't have to be exotic to explore the unexplained. At the International Conference on High Energy Physics, which ends today in Paris, scientists from the GammeV-CHASE experiment unveiled the first results from their experiment, which used 30 hours' worth of data from a 10-meter-long experiment to place the world's best limits on particles of dark energy.

  • One Step Closer to Finding the God Particle

    Updated: 2010-07-28 19:00:25
    The God Particle, or the Higgs Boson as its known in the Physics world, is coming closer and closer

  • Fermilab Closes in on Higgs Boson

    Updated: 2010-07-28 08:19:35
    Particle Physicists hunting for the ever elusive Higgs Boson reported their latest findings at the I

  • Recipe for a Universe | cern

    Updated: 2010-07-28 05:12:17
    Recipe for a Universe: “Take a massive explosion to create plenty of stardust and a raging hea

  • Can you believe it? The LHC is not big enough

    Updated: 2010-07-28 00:06:53
    Image by Getty Images via @daylife and the really important proton collisions haven’t happened

  • LHC results: Not just the same old thing

    Updated: 2010-07-27 17:44:40
    At the International Conference on High Energy Physics someone said something about Supersymmetry. T

  • US LHC Blog ICHEP’s Biggest Day

    Updated: 2010-07-27 17:20:54
    Follow us : on US LHC Blogs Home ICHEP’s Biggest Day Posted by Seth Zenz on 27 Jul 2010 at 04:12 am Yesterday was , I suppose , the biggest and most formal day here at the 35th International Conference of High Energy Physics . I wore my suit , and took some ribbing from some of my colleagues for dressing up so much , but I’ve worn it for far less excuse and am not sorry in the slightest . It’s not every day , or even every ICHEP , that one hears an address from the President of the French Republic Mr . Sarkozy’s speech was great to hear . He is a very emotive , enthusiastic , and informal speaker , which made him relatively easy to understand for those in the audience like me with limited French . He didn’t claim to know the details of our work , and seemed to think we’re all a little

  • Blogging ICHEP 2010 Day 4 the Higgs is not there Yet

    Updated: 2010-07-27 17:20:49
    : : . . Pages Blog About this blog Featured bloggers Blogging ICHEP 2010 A collective forum about the 35th edition of the International Conference on High Energy Physics Paris , July 2010 Tuesday , July 27, 2010 Day 4 : the Higgs is not there . . Yet Now we know , the Higgs boson did not show up at Tevatron . Yet But we also know that , if it exists , we would not find it in the 158-175 GeV mass range . Th e saga of the Tevatron Higgs talks finally came to an end , certainly matching the expectation , at least for what concerns the show part . Well , as for the scientific part , after all the preliminary steps of the last days nobody was really any hint of signal anymore . We mortals might not be able to make fancy statistical combinations by eye , but it was still not too complicated to

  • US LHC Blog ICHEP’s Biggest Day

    Updated: 2010-07-27 17:20:48
    Follow us : on US LHC Blogs Home ICHEP’s Biggest Day Posted by Seth Zenz on 27 Jul 2010 at 04:12 am Yesterday was , I suppose , the biggest and most formal day here at the 35th International Conference of High Energy Physics . I wore my suit , and took some ribbing from some of my colleagues for dressing up so much , but I’ve worn it for far less excuse and am not sorry in the slightest . It’s not every day , or even every ICHEP , that one hears an address from the President of the French Republic Mr . Sarkozy’s speech was great to hear . He is a very emotive , enthusiastic , and informal speaker , which made him relatively easy to understand for those in the audience like me with limited French . He didn’t claim to know the details of our work , and seemed to think we’re all a little

  • ECASIA 2011

    Updated: 2010-07-27 00:00:00
    Conference: 4 Sep 2011 - 9 Sep 2011, Cardiff City Hall, Cardiff, United Kingdom.

  • IOP Annual Plasma Physics Conference 2011

    Updated: 2010-07-27 00:00:00
    Conference: 4 Apr 2011 - 7 Apr 2011, Marine Hotel, North Berwick, Scotland, United Kingdom. Organized by the IOP Plasma Physics group.

  • Higgs Boson on the horizon?

    Updated: 2010-07-26 19:41:44
    Otherwise known as the “God Particle”, the theoretical Higgs Boson is the elemental part

  • LHC results: Not just the same old thing

    Updated: 2010-07-26 17:30:52
    CERN's press release issued today states that the LHC's first measurements are allowing them to “rediscover” the Standard Model of particle physics. But the presentations at ICHEP tell a slightly different story.

  • Fermilab homes in on Higgs mass

    Updated: 2010-07-26 16:28:11
    Higgs likely lighter, and more elusive

  • Tevatron Higgs Exclusion

    Updated: 2010-07-26 15:56:42
    The combination of the CDF and DZero results previously described individually are now available. Th

  • Schedule for LHC’s next few years revealed

    Updated: 2010-07-26 15:35:20
    The race is on, or continuing between the LHC and the Tevatron.  Regular readers know of my passion

  • New Higgs Results From the Tevatron

    Updated: 2010-07-26 15:22:26
    Just got back from vacation this morning. Luckily I managed to be away for the blogosphere-fueled Higgs rumors, returned just in time to catch the released results which appeared in a Fermilab press release minutes ago. The ICHEP talk in Paris announcing these results will start in about half an hour, slides should appear here. [...]

  • New limits on Higgs mass announced

    Updated: 2010-07-26 15:19:58
    New constraints on the elusive Higgs particle are more stringent than ever before. Scientists of the CDF and DZero collider experiments at the U.S. Department of Energy’s Fermilab revealed their latest Higgs search results today (July 26) at the International Conference on High Energy Physics, held in Paris from July 22-28. Their results rule out a significant fraction of the allowed mass range established by earlier experiments.

  • High energy, higher costs

    Updated: 2010-07-26 11:28:16
    one black mass of jigs and jimjams... Based on your own experience, complete the following sentence

  • Schedule for LHC’s next few years revealed

    Updated: 2010-07-26 10:37:40
    Steve Myers, CERN's Director for Accelerators and Technology, presented the LHC schedule for the next 10 years today in the first plenary presentation at the International Conference on High Energy Physics. Myers also presented his predictions for the amount of data that the LHC may collect over the same time period. These predictions over the next few years will be scrutinized closely by scientists at Fermilab's Tevatron, who are currently pushing to extend the accelerator's life for a further 3 years.

  • W And Z Boson Physics Results From CMS

    Updated: 2010-07-26 01:41:14
    Ø Ø Ø FAQ Register Now Sign In Full Site Physical Sciences Earth Sciences Life Sciences Medicine Social Sciences Culture Newsletter HOME PHYSICAL SCIENCES PHYSICS SPACE CHEMISTRY APPLIED PHYSICS AEROSPACE OPTICS EARTH SCIENCES ENVIRONMENT ENERGY ATMOSPHERIC PALEONTOLOGY GEOLOGY OCEANOGRAPHY LIFE SCIENCES GENETICS MOLECULAR BIOLOGY EVOLUTION MICROBIOLOGY ECOLOGY ZOOLOGY IMMUNOLOGY NEUROSCIENCE MEDICINE CANCER RESEARCH PUBLIC HEALTH PHARMACOLOGY CLINICAL RESEARCH AGING VISION SOCIAL SCIENCES ANTHROPOLOGY ARCHAEOLOGY PSYCHOLOGY SCIENCE EDUCATION POLICY SCIENCE HISTORY PHILOSOPHY ETHICS CULTURE TECHNOLOGY MATHEMATICS SCIENCE SOCIETY CONSERVATION RANDOM THOUGHTS HUMOR VIDEO CONTRIBUTORS Subscribe to the newsletter x Stay in touch with the scientific world Home Physical Sciences Physics A

  • Guest Post: Vladimir Khachatryan, The Higgs Mass From The Four-Colour Theorem

    Updated: 2010-07-25 08:26:23
    : , Ø Ø Ø FAQ Register Now Sign In Full Site Physical Sciences Earth Sciences Life Sciences Medicine Social Sciences Culture Newsletter HOME PHYSICAL SCIENCES PHYSICS SPACE CHEMISTRY APPLIED PHYSICS AEROSPACE OPTICS EARTH SCIENCES ENVIRONMENT ENERGY ATMOSPHERIC PALEONTOLOGY GEOLOGY OCEANOGRAPHY LIFE SCIENCES GENETICS MOLECULAR BIOLOGY EVOLUTION MICROBIOLOGY ECOLOGY ZOOLOGY IMMUNOLOGY NEUROSCIENCE MEDICINE CANCER RESEARCH PUBLIC HEALTH PHARMACOLOGY CLINICAL RESEARCH AGING VISION SOCIAL SCIENCES ANTHROPOLOGY ARCHAEOLOGY PSYCHOLOGY SCIENCE EDUCATION POLICY SCIENCE HISTORY PHILOSOPHY ETHICS CULTURE TECHNOLOGY MATHEMATICS SCIENCE SOCIETY CONSERVATION RANDOM THOUGHTS HUMOR VIDEO CONTRIBUTORS Subscribe to the newsletter x Stay in touch with the scientific world Home Physical Sciences Physics A

  • Closing in on the Higgs Boson

    Updated: 2010-07-24 02:54:03
    In the Guardian’s science blog, a great writeup on what’s happening at the International

  • Higgs is the hot topic at ICHEP

    Updated: 2010-07-24 01:55:34
    Everyone's catching Higgs fever, even French President Nicolas Sarkozy. The elusive particle - and the race between the experiments at Fermilab's Tevatron and those at the Large Hadron Collider to discover it - have made headlines for years, but the frenzy reached new heights in the run-up to the International Conference on High Energy Physics.

  • symmetry breaking

    Updated: 2010-07-23 20:15:06
    Europe reaches the top , err , the top reaches Europe July 23, 2010 5:44 am It might be a long way to the top , but the LHC experiments are already half-way there . Today at the International Conference on High Energy Physics in Paris , the CMS and ATLAS experiments presented their first top quark candidates . These candidates are collisions that have all the hallmarks of having produced top quarks , but the experiments don’t yet have enough data to be 100 sure that the events created top quarks that decayed into other particles rather than another type of . event The signal is starting to rise from the background , 8221 notes Tim Christiansen from . CMS The top quark , the heaviest particle in the Standard Model , was discovered at Fermilab’s Tevatron in 1995. The CDF and DZero

  • Fermilab Today

    Updated: 2010-07-23 20:15:05
    Thursday , Oct . 15, 2009 Subscribe Contact Us Archive Classifieds Guidelines Help Search Calendar Have a safe day Thursday , Oct . 15 2:30 . p.m Theoretical Physics Seminar Curia II Speaker : Tanju Gleisberg , SLAC National Accelerator Laboratory Title : Multiparton Production at NLO with BlackHat and Sherpa 3:30 . p.m DIRECTOR'S COFFEE BREAK 2nd Flr X-Over 4 . p.m Accelerator Physics and Technology Seminar One West Speaker : Yipeng Sun , CERN Title : Beam Dynamics Aspects of Crab Cavities in the Large Hadron Collider Friday , Oct . 16 3:30 . p.m DIRECTOR'S COFFEE BREAK 2nd Flr X-Over THERE WILL BE NO JOINT EXPERIMENTAL-THEORETICAL PHYSICS SEMINAR THIS WEEK 8 . p.m Fermilab Lecture Series Ramsey Auditorium , 7 Dr . Domenico Meli , Indiana University presents : Galileo and the

  • US LHC Blog Particles and Searches

    Updated: 2010-07-23 20:15:04
    Follow us : on US LHC Blogs Home Particles and Searches Posted by Regina on 23 Jul 2010 at 09:30 am Lots of us bloggers have been talking about ICHEP which is going on this week . I’m not attending the conference , although some of the work I’ve been doing is Now I’ve been turning my attention back to my physics analysis . As of about a week ago we have 200 nb-1 now closer to 300 nb-1 of data which is about 1 50th of what I hope to get for an . analysis I briefly mentioned that I’ll be doing a search in a previous post Now I’d like to share a bit what this particle beast is . A leptoquark carries quantum numbers for both quarks and leptons . It would decay by generation such that it mixes families of quarks and leptons . So why do we think it exists In a word : . Symmetry Physicists love

  • US LHC Blog My First Day at ICHEP

    Updated: 2010-07-23 20:15:00
    Follow us : on US LHC Blogs Home My First Day at ICHEP Posted by Seth Zenz on 23 Jul 2010 at 01:51 am There are probably many blogs where you can read summaries of the ICHEP conference or if not , there will be soon enough so I’m going to limit myself to telling you about my day . Getting my poster printed and getting it to Paris in one piece was stressful but uneventful in the end , and once I got to the conference things were easy . The poster session was the first evening , and you can see me at right standing in front of the thing , ready to explain what’s going on . I will soon post more about the measurement shown in the poster , but here is the official ATLAS conference note and here is an old summary of some of the concepts I didn’t get an overwhelming number of people asking

  • US LHC Blog Particles and Searches

    Updated: 2010-07-23 15:30:15
    Follow us : on US LHC Blogs Home Particles and Searches Posted by Regina on 23 Jul 2010 at 09:30 am Lots of us bloggers have been talking about ICHEP which is going on this week . I’m not attending the conference , although some of the work I’ve been doing is Now I’ve been turning my attention back to my physics analysis . As of about a week ago we have 200 nb-1 now closer to 300 nb-1 of data which is about 1 50th of what I hope to get for an . analysis I briefly mentioned that I’ll be doing a search in a previous post Now I’d like to share a bit what this particle beast is . A leptoquark carries quantum numbers for both quarks and leptons . It would decay by generation such that it mixes families of quarks and leptons . So why do we think it exists In a word : . Symmetry Physicists love

  • Combined Tevatron Higgs searches at ICHEP

    Updated: 2010-07-23 14:17:51
    This afternoon there will be a couple of talks corresponding to Higgs searches at CDF and DZero (The

  • Europe reaches the top, err, the top reaches Europe

    Updated: 2010-07-23 11:44:16
    It might be a long way to the top, but the LHC experiments are already half way there: at the ICHEP conference in Paris CMS and ATLAS presented their first candidates for top quark, the heaviest particle in the Standard Model.

  • US LHC Blog My First Day at ICHEP

    Updated: 2010-07-23 07:51:56
    Follow us : on US LHC Blogs Home My First Day at ICHEP Posted by Seth Zenz on 23 Jul 2010 at 01:51 am There are probably many blogs where you can read summaries of the ICHEP conference or if not , there will be soon enough so I’m going to limit myself to telling you about my day . Getting my poster printed and getting it to Paris in one piece was stressful but uneventful in the end , and once I got to the conference things were easy . The poster session was the first evening , and you can see me at right standing in front of the thing , ready to explain what’s going on . I will soon post more about the measurement shown in the poster , but here is the official ATLAS conference note and here is an old summary of some of the concepts I didn’t get an overwhelming number of people asking

  • True or False?

    Updated: 2010-07-22 23:12:51
    Scientists searching for the Higgs boson or ‘god particle’ have appeared confused and em

  • The ILC in one minute flat

    Updated: 2010-07-22 21:27:00
    Fly through an animated version of the International Linear Collider.

  • US LHC Blog ICHEP what to watch for

    Updated: 2010-07-22 17:51:28
    : Follow us : on US LHC Blogs Home ICHEP : what to watch for Posted by Ken Bloom on 21 Jul 2010 at 04:19 pm At long last , the 35th International Conference on High Energy Physics begins tomorrow . It’s the largest particle-physics conference of the year , and the first major conference since the start of LHC operations at 7 TeV , If the US LHC blog has seemed to be a bit quiet lately , it might be because so many bloggers have been working hard to get results ready . Now , it’s highly unlikely that there will be any surprising LHC discoveries announced there we just don’t have nearly enough data yet . But that doesn’t mean that this conference will be boring Here are a few things that you might want to be watching : for How well are the experiments keeping up with the LHC The LHC has now

  • Eyes turn from CERN to Fermilab at ICHEP

    Updated: 2010-07-22 16:20:24
    Today saw the launch of the ICHEP parallel sessions and for those of us not able to attend it meant

  • ICHEP2010

    Updated: 2010-07-22 09:12:44
    Home Local Organizing Committee International Advisory Committee Country Coordinators Tracks and Conveners Registration Payment Submit Contributions View my abstracts Submit a new abstract Specifications for posters talks Timetable Timetable compact PDF format List of Participants List of speakers List of Contributions Book of Abstracts Live webcast Proceedings The French particle physics community is particularly proud to have been selected to host the 35th ICHEP conference in 2010 in Paris . This conference is the focal point of all our field since more than fifty years and is the reference event where all important results in particle physics cosmology and astroparticles are presented and discussed . This alone suffices to make this event very important . But in 2010, a coincidence of

  • US LHC Blog It is possible to have a life outside of the lab

    Updated: 2010-07-22 09:12:40
    . Follow us : on US LHC Blogs Home It is possible to have a life outside of the . lab Posted by Jake Anderson on 21 Jul 2010 at 04:03 pm Get a life seems to be a tried and true TV line when talking to geeks , nerds and the like . I’d like to think I have one . It must be the birth of my third son that has me reflecting on a larger scale than usual , but I haven’t found that being a physicist has been a significant burden on my personal . life I know there are stereo types of physicist spending day and night at the lab working . My wife often likes to tease me that when I get home late from work it isn’t because of anything she needs to worry about I was engrossed in my work and lost track of time . I’ll admit that it has happened ok more than once but I don’t make a habit of it . Most of

  • US LHC Blog Almost There

    Updated: 2010-07-22 09:12:38
    Follow us : on US LHC Blogs Home Almost There Posted by Seth Zenz on 19 Jul 2010 at 01:31 pm The official ATLAS conference note describing the analysis I worked on was approved on Saturday morning . My poster was finalized , approved , and printed possibly not in that order just in the past few hours . Now the only challenge left is to get myself and my poster through a French air traffic controllers’ strike and to the Palais de Congrès by Thursday . morning 2 Comments 2 Responses to Almost There” on 19 Jul 2010 at 2:34 pm Harbles Go to London and take the Chunnel train on 22 Jul 2010 at 12:44 am Seth Zenz That was more or less my backup plan , except that itinerary was to go to Frankfurt , and then to Paris so if the second flight had been cancelled I could have just taken the train from

  • US LHC Blog The size of the proton

    Updated: 2010-07-22 09:12:35
    Follow us : on US LHC Blogs Home The size of the proton Posted by Christine Nattrass on 12 Jul 2010 at 07:32 pm There is a new measurement of the size of the proton and it turns out that protons are smaller than we thought they . were At some point in your education you probably got introduced to the Bohr model of the atom . The nucleus is made up of protons and neutrons , and electrons orbit around the nucleus . In the Bohr model , electrons orbit the nucleus in circular orbits like the Earth orbits the Sun , but these orbits are only allowed to have some radii which correspond to an integer number of de Broglie wave lengths Electrons can transition between these levels and when they do , they either absorb a photon in the case of an electron being excited from , say , the ground state to

  • Happy Higgs Hunting

    Updated: 2010-07-22 03:47:11
    Skip to content Asymptotia Proof Happy Higgs Hunting Published by Clifford on July 21, 2010 in research science science in the media and work In case you were wondering , things are moving steadily along in the search for the Higgs boson , and in the general ramping up to study entirely new frontiers of particle physics . I noticed a couple of interesting articles today that give you a nice sample . The first , by Dick Ahlstrom in the Irish Times , and is about the announced rediscovery” of the W and Z bosons at the Large Hadron Collider by a team working at the LHCb experiment . I personally think that the term rediscovery” is somewhat misleading since it makes it seem like the community forgot where they the key signatures of the unity of the electromagnetic and weak nuclear forces at

  • Particle physicists collide in Paris

    Updated: 2010-07-22 01:07:35
    Paris’ 17th arrondissement has become particle physics central. More than 1,000 physicists have descended on the Palais de Congrès conference center to attend the 35th International Conference on High Energy Physics, which kicks off today and continues through next Wednesday. ICHEP is the world’s premier particle physics conference, where scientists present and discuss the newest and most intriguing results from experiments in particle physics, particle astrophysics and cosmology, innovative theoretical approaches and predictions, and concepts for future accelerators and particle detectors.

  • US LHC Blog ICHEP what to watch for

    Updated: 2010-07-21 22:19:36
    : Follow us : on US LHC Blogs Home ICHEP : what to watch for Posted by Ken Bloom on 21 Jul 2010 at 04:19 pm At long last , the 35th International Conference on High Energy Physics begins tomorrow . It’s the largest particle-physics conference of the year , and the first major conference since the start of LHC operations at 7 TeV , If the US LHC blog has seemed to be a bit quiet lately , it might be because so many bloggers have been working hard to get results ready . Now , it’s highly unlikely that there will be any surprising LHC discoveries announced there we just don’t have nearly enough data yet . But that doesn’t mean that this conference will be boring Here are a few things that you might want to be watching : for How well are the experiments keeping up with the LHC The LHC has now

  • US LHC Blog It is possible to have a life outside of the lab

    Updated: 2010-07-21 22:03:11
    . Follow us : on US LHC Blogs Home It is possible to have a life outside of the . lab Posted by Jake Anderson on 21 Jul 2010 at 04:03 pm Get a life seems to be a tried and true TV line when talking to geeks , nerds and the like . I’d like to think I have one . It must be the birth of my third son that has me reflecting on a larger scale than usual , but I haven’t found that being a physicist has been a significant burden on my personal . life I know there are stereo types of physicist spending day and night at the lab working . My wife often likes to tease me that when I get home late from work it isn’t because of anything she needs to worry about I was engrossed in my work and lost track of time . I’ll admit that it has happened ok more than once but I don’t make a habit of it . Most of

  • The (Simple) Physics of the 'God Particle'

    Updated: 2010-07-21 19:00:34
    The ‘God Particle’. Pretty catchy name. Its been in the news quite a bit lately. But wha

  • I Wish Your Wish (Would Fall Off)

    Updated: 2010-07-21 17:09:15
    A few weeks ago, the New York Times highlighted the work of Brazilian artist Rivane Neuenschwander. The article focused in part on her piece “I Wish Your Wish”, shown below. The conceit of the piece is rather lovely. As described in the article, the piece “is derived from a tradition popular among pilgrims to [...]

  • ATLAS Reach For The Higgs Boson

    Updated: 2010-07-21 10:54:38
    The Atlas collaboration made public, just in time for the 2010 ICHEP conference in Paris, the projected reach of their searches for standard model Higgs bosons. This is a whole set of interesting new results which, although necessarily still based on simulations, tell us a lot about what we might see toward the end of next year at the LHC. Here I will just flash a couple of the results, because the plentiful online documentation that ATLAS provided makes it a worthless exercise on my part to just echo it here. However, maybe I can comment the most relevant plots for those of you too lazy to browse the information-thick ATLAS pages. read more

  • Here comes Katla?

    Updated: 2010-07-21 00:43:44
    Being kind of a volcano/earthquake geek, I regularly check in on the recent California earthquake records, the Kilauea activity, and, in the past couple months since the Eyjafjallajokull, the earthquake activity near it that might presage an eruption of Eyja’s big sister, Katla. Historically, eruptions of Eyjafjallajokull are followed by eruptions of Katla, which [...]

  • US LHC Blog Almost There

    Updated: 2010-07-20 02:00:23
    Follow us : on US LHC Blogs Home Almost There Posted by Seth Zenz on 19 Jul 2010 at 01:31 pm The official ATLAS conference note describing the analysis I worked on was approved on Saturday morning . My poster was finalized , approved , and printed possibly not in that order just in the past few hours . Now the only challenge left is to get myself and my poster through a French air traffic controllers’ strike and to the Palais de Congrès by Thursday . morning No Comments Leave a Reply All comments must be approved before appearing in the thread . We will only approve comments that are directly related to the blog , use appropriate language and are not attacking the comments of . others Name required Mail will not be published required Website Submit Comment Search : for Latest posts That’s

  • US LHC Blog That’s what I like to see

    Updated: 2010-07-19 17:22:33
    Follow us : on US LHC Blogs Home That’s what I like to see Posted by Mike Anderson on 18 Jul 2010 at 12:56 pm Stable proton beams colliding at some of the highest luminosities reached by the LHC so far Right now the luminosity is at 10 30 cm 2 s . Up until now , the luminosity collected these past few months has been at a luminosity around , at most , 10 29 cm 2 . s This is significant because this basically means that in about a day we can collect the same amount of data that we have collected over the past few months That’s why it’s so useful to do studies on increasing the luminosity rather than continuing to run at lower . luminosities There’s a short term downside though : doing studies to increase luminosity makes it hard to get clean , stable beams for data taking . It’s kind of

  • OP Vistars

    Updated: 2010-07-19 00:43:54
    ADE CPS CPS EAST Area CTF GPS HRS LEIR LHC Beam Dump LHC CMS Experiment LHC Configuration LHC Coordination LHC Cryogenics LHC Exp Magnets LHC Operation LHC Page 1 LHCf Experiment Linac II PSB PSP CNGS SPS LHC HIGH SPS LHC LOW SPS Page 1 SPS SFTLONG OP Vistars

  • US LHC Blog That’s what I like to see

    Updated: 2010-07-18 18:56:10
    Follow us : on US LHC Blogs Home That’s what I like to see Posted by Mike Anderson on 18 Jul 2010 at 12:56 pm Stable proton beams colliding at some of the highest luminosities reached by the LHC so far Right now the luminosity is at 10 30 cm 2 s . Up until now , the luminosity collected these past few months has been at a luminosity around , at most , 10 29 cm 2 . s This is significant because this basically means that in about a day we can collect the same amount of data that we have collected over the past few months That’s why it’s so useful to do studies on increasing the luminosity rather than continuing to run at lower . luminosities There’s a short term downside though : doing studies to increase luminosity makes it hard to get clean , stable beams for data taking . It’s kind of

  • Why did Peter Higgs miss the true nature of Higgs Mechanism?

    Updated: 2010-07-18 11:22:53
    To us, Peter Higgs comes across as a person of great integrity and honesty. He has candidly acknowle

  • Game on! and a whiff of the Higgs

    Updated: 2010-07-17 21:43:44
    Mexico rocked my socks. That country rocked my socks right off. I have no more socks. And I’m

  • Lines on the non-Discovery of the Higgs Boson

    Updated: 2010-07-14 09:50:41
    In search of fame I spread around A rumour that the Higgs was found; But now it’s clear it was

  • No Higgs boson for Fermilab's Tevatron collider

    Updated: 2010-07-14 06:34:00
    Rumours of a discovery of the Higgs boson at Fermilab’s Tevatron collider appear to be unfound

  • Rumors About "The God Particle"

    Updated: 2010-07-14 05:06:52
    Scuttlebutt is that the scientists at Fermilab just outside of Chicago may have found evidence for t

  • The Cream Has Sat Out Too Long

    Updated: 2010-07-14 00:50:37
    * Circumstances when whipping it should be considered. * I can’t believe there are actually pe

  • Share bookmark email LHC Play along at home or scoreboard watching AddToAny

    Updated: 2010-07-13 21:43:58
    , , : , Preferences Get the button Share Bookmark LHC : Play along at home or , scoreboard watching E-mail Facebook Digg MySpace Windows Live Favorites Bebo Google Reader Netvibes Share Posterous Yahoo Mail MSDN Arto Plurk Identi.ca TypePad Post Netlog CiteULike Hemidemi PhoneFavs Wink BlogMarks Kledy Yoolink NewsVine Plaxo Pulse Protopage Bookmarks YiGG Pusha Fark Imera Brazil MindBodyGreen Diglog Tumblr HelloTxt Oneview LinkedIn Viadeo Connotea SiteJot Care2 News Bitty Browser Tagza VodPod PrintFriendly E-mail program Twitter Google Bookmarks Reddit StumbleUpon Mister-Wong Orkut Stumpedia DailyMe Hotmail TechNet Tipd AIM Mozillaca Box.net Technorati Favorites Jumptags FunP Xerpi Diigo Tailrank Khabbr Bookmarks.fr Multiply Ping Blinklist Webnews YouMob Allvoices Twiddla unalog NowPublic

  • OP Vistars

    Updated: 2010-07-13 21:43:58
    ADE CPS CPS EAST Area CTF GPS HRS LEIR LHC Beam Dump LHC CMS Experiment LHC Configuration LHC Coordination LHC Cryogenics LHC Exp Magnets LHC Operation LHC Page 1 LHCf Experiment Linac II PSB PSP CNGS SPS LHC HIGH SPS LHC LOW SPS Page 1 SPS SFTLONG OP Vistars

  • LHC Programme Coordination Home Page

    Updated: 2010-07-13 21:43:58
    LHC Luminosity Plots LPC home This web site is owned by the account lpc Web site visited . times

  • US LHC Blog LHC Play along at home or scoreboard watching

    Updated: 2010-07-13 21:43:57
    : , Follow us : on US LHC Blogs Home LHC : Play along at home or , scoreboard watching Posted by Ken Bloom on 12 Jul 2010 at 10:05 pm OK , I’ll admit it instead of writing blog posts or reviewing results that are headed for ICHEP or doing something else productive , I find myself all too easily distracted by information on the current status of the LHC . As the gallant accelerator physicists work to push the machine to higher beam intensities and collision rates , I’m eager to learn about each little bit of progress . It definitely has some meaning to me the more collisions the LHC produces , the more the experiments can record , and the greater the chance that we will see any particular physics process take place . Especially as we get close to the big ICHEP conference , we are all

  • Matter wave Wikipedia the free encyclopedia

    Updated: 2010-07-13 21:43:54
    , Matter wave From Wikipedia , the free encyclopedia Jump to : navigation search In quantum mechanics a matter wave or de Broglie wave pronounced də bʁœj help info is the wave wave-particle duality of matter The de Broglie relations show that the wavelength is inversely proportional to the momentum of a particle and that the frequency is directly proportional to the particle's kinetic energy The wavelength of matter is also called de Broglie wavelength The theory was advanced by Louis de Broglie in 1924 in his PhD thesis 1 he was awarded the Nobel Prize for Physics in 1929 for this work , which made him the first person to receive a Nobel Prize on a PhD . thesis Contents 1 Historical context 2 The de Broglie relations 3 Experimental confirmation 3.1 Elementary particles 3.2 Neutral atoms

  • Lamb shift Wikipedia the free encyclopedia

    Updated: 2010-07-13 21:43:52
    , Lamb shift From Wikipedia , the free encyclopedia Jump to : navigation search Quantum field theory Feynman diagram History of . Background Gauge theory Field theory Poincaré symmetry Quantum mechanics Spontaneous symmetry breaking Symmetries Crossing Charge conjugation Parity Time reversal Tools Anomaly Effective field theory Expectation value Faddeev–Popov ghosts Feynman diagram LSZ reduction formula Partition function Propagator Quantization Renormalization Vacuum state Wick's theorem Wightman axioms Equations Dirac equation Klein–Gordon equation Proca equations Wheeler–DeWitt equation Standard Model Electroweak interaction Higgs mechanism Quantum chromodynamics Quantum electrodynamics Yang–Mills theory Incomplete theories Quantum gravity String theory Supersymmetry Technicolor Theory

  • femtometer Wiktionary

    Updated: 2010-07-13 21:43:50
    femtometer Definition from Wiktionary , the free dictionary Jump to : navigation search Contents 1 English 1.1 Etymology 1.2 Noun 1.3 Anagrams edit English edit Etymology femto- meter edit Noun Singular femtometer Plural femtometers femtometer plural femtometers US spelling of femtometre A length of 10 15 of a meter , 1 quadrillionth of a . meter edit Anagrams femtometre Retrieved from http : en.wiktionary.org wiki femtometer Categories English words prefixed with femto- English nouns American English English alternative spellings SI units Physics Views Entry Discussion Edit History Personal tools Try Beta Log in create account Search Navigation Main Page Community portal Wiktionary preferences Requested entries Recent changes by language Random entry by language Help Donations Contact us

  • Muon Wikipedia the free encyclopedia

    Updated: 2010-07-13 21:43:50
    , Muon From Wikipedia , the free encyclopedia Jump to : navigation search Muon The Moon s cosmic ray shadow , as seen in secondary muons generated by cosmic rays in the atmosphere , and detected 700 meters below ground , at the Soudan II . detector : Composition Elementary particle Particle statistics Fermionic : Group Lepton Generation Second Interaction Gravity Electromagnetic Weak Symbol(s μ Antiparticle Antimuon μ : Theorized : Discovered Carl D . Anderson 1936 Mass 105.658 3 69(9 MeV c 2 Mean lifetime 2.197 0 3(4 10 6 s 1 Electric charge 1 e Color charge None Spin 1 2 The muon from the Greek letter mu μ used to represent it is an elementary particle similar to the electron with a negative electric charge and a spin of 1 2 Together with the electron the tau and the three neutrinos it

  • Standard Model Wikipedia the free encyclopedia

    Updated: 2010-07-13 21:43:49
    , Standard Model From Wikipedia , the free encyclopedia Jump to : navigation search For other uses , see Standard model disambiguation The Standard Model of elementary particles with the gauge bosons in the rightmost . column Standard model of particle physics Standard Model Background Particle physics Quantum field theory Gauge theory Spontaneous symmetry breaking Higgs mechanism Constituents Electroweak interaction Quantum chromodynamics CKM matrix Limitations Strong CP problem Hierarchy problem Neutrino oscillations Theorists Sudarshan Marshak Feynman Gell-Mann Sakata Glashow Zweig Nambu Han Cabibbo Weinberg Salam Kobayashi Maskawa t Hooft Veltman Gross Politzer Wilczek v d e The standard model of particle physics is a theory concerning the electromagnetic weak and strong nuclear

  • Higgs Boson rumor/awesomeness

    Updated: 2010-07-13 21:06:05
    There’s been a lot of buzz lately about possible evidence of the elusive Higgs Boson, the so-c

  • US LHC Blog LHC Play along at home or scoreboard watching

    Updated: 2010-07-13 04:05:07
    : , Follow us : on US LHC Blogs Home LHC : Play along at home or , scoreboard watching Posted by Ken Bloom on 12 Jul 2010 at 10:05 pm OK , I’ll admit it instead of writing blog posts or reviewing results that are headed for ICHEP or doing something else productive , I find myself all too easily distracted by information on the current status of the LHC . As the gallant accelerator physicists work to push the machine to higher beam intensities and collision rates , I’m eager to learn about each little bit of progress . It definitely has some meaning to me the more collisions the LHC produces , the more the experiments can record , and the greater the chance that we will see any particular physics process take place . Especially as we get close to the big ICHEP conference , we are all

  • US LHC Blog The size of the proton

    Updated: 2010-07-13 01:32:23
    Follow us : on US LHC Blogs Home The size of the proton Posted by Christine Nattrass on 12 Jul 2010 at 07:32 pm There is a new measurement of the size of the proton and it turns out that protons are smaller than we thought they . were At some point in your education you probably got introduced to the Bohr model of the atom . The nucleus is made up of protons and neutrons , and electrons orbit around the nucleus . In the Bohr model , electrons orbit the nucleus in circular orbits like the Earth orbits the Sun , but these orbits are only allowed to have some radii which correspond to an integer number of de Broglie wave lengths Electrons can transition between these levels and when they do , they either absorb a photon in the case of an electron being excited from , say , the ground state to

  • Has the Higgs Boson been found

    Updated: 2010-07-13 00:40:25
    Fermilab Accelerator Rumours have being coming from the Fermi National Accelerator Laboratory in Bat

  • Rumors on Higgs at Tevatron

    Updated: 2010-07-10 19:51:33
    It is not my habit to put rumors about as my readers know, but the news is really sensational. Tomma

  • US LHC Blog Track Jets for ICHEP

    Updated: 2010-07-10 13:13:53
    Follow us : on US LHC Blogs Home Track Jets for ICHEP Posted by Seth Zenz on 09 Jul 2010 at 06:20 pm Along with many other particle physicists , I’ve been working hard lately to prepare results for the 35th International Conference on High Energy Physics which will be held in Paris starting on July 22nd . That means I am again going through the complexities of reviewing my work with my 3000+ collaborators to make sure that the work I’ve done is something we all have confidence in . After all , everyone’s name will be on it So far , things are going well , and it looks like cross your fingers the analysis will be out and ready . I just designed a poster this week , and some of the plots might also appear in one of the ATLAS talks given by one of my colleagues . The approval process has also

  • ICHEP2010

    Updated: 2010-07-10 13:13:52
    Home Local Organizing Committee International Advisory Committee Country Coordinators Tracks and Conveners Registration Payment Submit Contributions View my abstracts Submit a new abstract Specifications for posters talks Timetable List of Participants List of speakers List of Contributions Live webcast The French particle physics community is particularly proud to have been selected to host the 35th ICHEP conference in 2010 in Paris . This conference is the focal point of all our field since more than fifty years and is the reference event where all important results in particle physics cosmology and astroparticles are presented and discussed . This alone suffices to make this event very important . But in 2010, a coincidence of exceptional events will make this conference even more

  • US LHC Blog My Thesis Topic Measuring Jets with the Inner Detector

    Updated: 2010-07-10 13:13:51
    : Follow us : on US LHC Blogs Home My Thesis Topic : Measuring Jets with the Inner Detector Posted by Seth Zenz on 03 Oct 2009 at 11:38 pm Hi , Seth here . I haven’t written much here lately , because I’ve been busy with two rather involved tasks . First , I’ve been working on the logistics of moving back to California in a few months and second , I’ve been I’ve been getting my thesis topic in shape . I gave a talk on it in a decent-sized ATLAS experiment meeting last week . Now that I’ve explained my work to my collaborators , I’m ready to try my hand at explaining it to all of . you The current title , at least for the talk I just gave , is Inclusive Jet Cross Section using the Inner Detector To explain what that means , I’ll have to take the title literally word by . word What’s a cross

  • Reconstruction of jets from tracks in proton-proton collisions at centre-of-mass energy sqrt{s 900$

    Updated: 2010-07-10 13:13:51
    Reconstruction of jets from tracks in proton-proton collisions at centre-of-mass energy sqrt{s 900$ GeV with the ATLAS detector ATLAS-CONF-2010-002 5 March 2010 Content Preview Main document CDS record Figure 1 The transverse momentum distribution of track jets : one entry per jet . The jets are required to have eps , 10kB png , 43kB Figure 2 The pseudorapidity distribution of track jets with p T 4 GeV , tracks have eps , 12kB png , 49kB Figure 3 Difference in between the two leading track jets in events containing at least two track jets with p T 4 GeV . The PYTHIA Monte Carlo MC simulation prediction shows the raw measured value after detector simulation , and is normalized to the same area as the data . eps , 12kB png , 51kB

  • US LHC Blog Track Jets for ICHEP

    Updated: 2010-07-10 13:13:49
    Follow us : on US LHC Blogs Home Track Jets for ICHEP Posted by Seth Zenz on 09 Jul 2010 at 06:20 pm Along with many other particle physicists , I’ve been working hard lately to prepare results for the 35th International Conference on High Energy Physics which will be held in Paris starting on July 22nd . That means I am again going through the complexities of reviewing my work with my 3000+ collaborators to make sure that the work I’ve done is something we all have confidence in . After all , everyone’s name will be on it So far , things are going well , and it looks like cross your fingers the analysis will be out and ready . I just designed a poster this week , and some of the plots might also appear in one of the ATLAS talks given by one of my colleagues . The approval process has also

  • How Finely-Tuned is the Universe?

    Updated: 2010-07-09 02:29:20
    Breaking radio silence here to report on some of the actual work I’ve been able to complete: a new paper with Heywood Tam. Unitary Evolution and Cosmological Fine-Tuning Authors: Sean M. Carroll, Heywood Tam (Submitted on 8 Jul 2010) Abstract: Inflationary cosmology attempts to provide a natural explanation for the flatness and homogeneity of [...]

  • Who are you people?

    Updated: 2010-07-06 06:19:03
    A bunch of blogs are inviting their commenters (and, especially, lurkers) to out themselves. As it has been a couple of years since our previous de-lurking, we figured we’d join in on the fun. We know that Cosmic Variance readers are all strong, good looking, and better than average. Why don’t you say hello? Maybe tell [...]

  • US LHC Blog Independence day

    Updated: 2010-07-05 10:03:26
    Follow us : on US LHC Blogs Home Independence day Posted by Regina on 04 Jul 2010 at 09:03 pm Sorry for the hiatus , blog enthusiasts I’m taking some time to catch-up while watching the fireworks out of my window on July 4th . Tis the season for summer conferences . The one in particular that I’m involved in is ICHEP International Conference on High Energy Physics is coming up at the end of July , which means all the papers have to be approved by ATLAS by the end of June which just so happened to be last week hooray independence  This year the conference is in Paris and there we’ll show the first physics results from the LHC . ATLAS alone has over 40 papers submitted . In particular I’ve been looking at material mapping using . photons So what is material mapping sounds like something

  • US LHC Blog Independence day

    Updated: 2010-07-05 10:03:23
    Follow us : on US LHC Blogs Home Independence day Posted by Regina on 04 Jul 2010 at 09:03 pm Sorry for the hiatus , blog enthusiasts I’m taking some time to catch-up while watching the fireworks out of my window on July 4th . Tis the season for summer conferences . The one in particular that I’m involved in is ICHEP International Conference on High Energy Physics is coming up at the end of July , which means all the papers have to be approved by ATLAS by the end of June which just so happened to be last week hooray independence  This year the conference is in Paris and there we’ll show the first physics results from the LHC . ATLAS alone has over 40 papers submitted . In particular I’ve been looking at material mapping using . photons So what is material mapping sounds like something

  • US LHC Blog The W boson mixing things up

    Updated: 2010-07-03 04:27:40
    : Follow us : on US LHC Blogs Home The W boson : mixing things up Posted by Flip Tanedo on 02 Jul 2010 at 03:03 pm For those of you who have been following our foray into the particle content of the Standard Model , this is where thing become exciting . We now introduce the W boson and present a nearly-complete picture of what we know about . leptons We’re picking up right where we left off , so if you need a refresher , please refer to previous installments where we introduce Feynman rules and several particles : Part 1 Part 2 Part 3 Part 4 Part 5 The W is actually two particles : one with positive charge and one with negative charge . This is similar to every electron having a positron anti-partner . Here’s the Particle Zoo s depiction of the W boson Together with the Z boson , the W s

  • Casting aside Copernicus

    Updated: 2010-06-30 15:19:15
    The Copernican principle is a guiding foundation of cosmology. In short, it states that we are not in a privileged place in the Universe. A “random” observer will see the same Universe that we do. The cosmological standard model does satisfy this principle in space: at this moment, any other observer in the Universe should [...]

  • US LHC Blog Anti-proton to proton ratio ALICE’s 4th paper submitted

    Updated: 2010-06-30 03:34:26
    Follow us : on US LHC Blogs Home Anti-proton to proton ratio ALICE’s 4th paper submitted Posted by Christine Nattrass on 29 Jun 2010 at 05:51 pm ALICE has just submitted its fourth paper on the anti-proton to proton ratio in p+p collisions , to Physical Review Letters . This is a really cool measurement because it is one way of quantifying how many of the particles we create in our collisions as opposed to how many of the particles we see are remnants of the . beam A proton has three valence quarks , two up quarks and one down quark . The proton’s electric charge is 1.  An anti-proton has three valence anti-quarks , two anti-up quarks and one anti-down quark . The anti-proton’s electric charge is 1.  The anti-proton is the proton’s anti-particle . When a proton and an anti-proton come

  • Proton Wikipedia the free encyclopedia

    Updated: 2010-06-30 03:34:23
    , Proton From Wikipedia , the free encyclopedia Jump to : navigation search For other uses , see Proton disambiguation Proton The quark structure of the proton . The color assignment of individual quarks is not important , only that all three colors are present . : Classification Baryon : Composition 2 up quarks 1 down quark Particle statistics Fermionic : Group Hadron Interaction Gravity Electromagnetic Weak Strong Symbol(s p p N Antiparticle Antiproton : Theorized William Prout 1815 : Discovered Ernest Rutherford 1919 Mass 1.672 6 21 6 37(83 10 27 kg 938.272 0 13(23 MeV c 2 1.007 2 76 4 66 7 7(10 u 1 Mean lifetime 2.1 10 29 yr stable Electric charge 1  e 1.602 1 76 4 87(40 10 19 C 1 Charge radius 0.877  fm 1 Electric dipole moment 5.4 10 24 e cm Electric polarizability 1.20(6 10 3 fm 3

  • Antiproton Wikipedia the free encyclopedia

    Updated: 2010-06-30 03:34:22
    , Antiproton From Wikipedia , the free encyclopedia Jump to : navigation search Negaton redirects here . For the negatively charged particle in an atom that was once called a negaton , see Electron Antiproton The quark structure of the . antiproton : Classification Antibaryon : Composition 2 up antiquarks 1 down antiquark Particle statistics Fermionic : Group Hadron Interaction Strong Weak Electromagnetic Gravity : Status Discovered Symbol(s p Particle Proton Mass 938 MeV c 2 Electric charge 1  e Spin 1 2 Isospin 1 2 Antimatter Annihilation Devices Particle accelerator Penning trap Wilson chamber Antiparticles Positron Antiproton Antineutron Uses Positron emission tomography Fuel Bodies ALPHA Collaboration ATHENA ATRAP CERN RHIC People Paul Dirac Carl David Anderson Andrei Sakharov v d e

  • Annihilation Wikipedia the free encyclopedia

    Updated: 2010-06-30 03:34:21
    , Annihilation From Wikipedia , the free encyclopedia Jump to : navigation search This article is about the quantum field theoretic process of particle–antiparticle annihilation . For other uses , see Annihilation disambiguation A Feynman diagram of a positron and an electron annihilating into a virtual photon which then decays back into a positron and an electron via Pair Production Annihilation is defined as total destruction or complete obliteration of an object 1 having its root in the Latin nihil nothing A literal translation is to make into nothing In physics the word is used to denote the process that occurs when a subatomic particle collides with its respective antiparticle 2 Since energy and momentum must be conserved , the particles are not actually made into nothing , but rather

  • Baryon Wikipedia the free encyclopedia

    Updated: 2010-06-30 03:34:20
    , Baryon From Wikipedia , the free encyclopedia Jump to : navigation search Baryons are the family of composite particles made of three quarks as opposed to the mesons which are the family of composite particles made of one quark and one antiquark Both baryons and mesons are part of the larger particle family comprising all particles made of quarks—the hadrons The term baryon is derived from the Greek βαρύς barys meaning heavy because at the time of their naming it was believed that baryons were characterized by having greater masses than other . particles Until very recently , it was believed that some experiments showed the existence of pentaquarks exotic baryons made of four quarks and one . antiquark 1 2 The particle physics community as a whole did not view their existence as likely

  • List of baryons Wikipedia the free encyclopedia

    Updated: 2010-06-30 03:34:19
    , List of baryons From Wikipedia , the free encyclopedia Jump to : navigation search This list is of all known and predicted baryons . See list of particles for a more detailed list of particles found in particle physics Baryons are the family of composite particle made of three quarks as opposed to the mesons which are the family of composite particles made of one quark and one antiquark Both baryons and mesons are part of the larger particle family comprising all particles made of quarks the hadron The term baryon is derived from the Greek βαρύς barys meaning heavy because at the time of their naming it was believed that baryons were characterized by having greater masses than other . particles Until very recently , it was believed that some experiments showed the existence of

  • Baryon number Wikipedia the free encyclopedia

    Updated: 2010-06-30 03:34:18
    , Baryon number From Wikipedia , the free encyclopedia Jump to : navigation search Flavour in particle physics Flavour quantum numbers Baryon number B Lepton number L Strangeness S Charm C Bottomness B Topness T Isospin I or I 3 Weak isospin T or T 3 Electric charge Q X-charge X : Combinations Hypercharge Y Y B S C B T Y 2 Q I 3 Weak hypercharge Y W Y W 2 Q T 3 X 2 Y W 5 B L Flavour mixing CKM matrix PMNS matrix Flavour complementarity In particle physics the baryon number is an approximate conserved quantum number of a system . It is defined as where n q is the number of quarks and n q is the number of antiquarks Baryons three quarks have a baryon number of 1, mesons one quark , one antiquark a baryon number of 0, and antibaryons three antiquarks have a baryon number of 1. Exotic hadrons

  • LHC vs. Tevatron Update

    Updated: 2010-06-28 23:11:51
    Over the weekend the LHC had a first successful physics run with nominal intensity beams, in 3 bunches. A peak luminosity of about 5 x 1029cm-2s-1 was achieved, and the total integrated luminosity per experiment is now around 30 nb-1. While this is quite a bit behind optimistic schedules of earlier this year, it may [...]

  • The God Particle

    Updated: 2010-06-27 05:00:09
    Bloody weather.  I got soaked to the skin this afternoon taking poochie for a walk and wasn’t

  • Prologue of ICONS First Release ‘True Nature of the Higgs Mechanism’

    Updated: 2010-06-26 14:29:00
    Many current scientific breakthroughs are based on the premise that there is a ready-made, fixed or

  • If Only Oil Spills Would Evaporate Like Climategate

    Updated: 2010-06-26 02:04:09
    Even if I’m on hiatus, there’s no reason not to post links to interesting things that I would be tweeting anyway. Blogs are still much better places to have conversations, whatever the Twitter triumphalists might think. With that in mind: check out this story by Sharon Begley from Newsweek, on how media are slowly [...]

  • The Large Cryogenic Gravitational-wave Telescope

    Updated: 2010-06-25 16:25:17
    I am presently in Japan, participating in the Gravity and Cosmology workshop at the Yukawa Institute for Theoretical Physics on the Kyoto University campus. The big news here is that the Large Cryogenic Gravitational-wave Telescope (LCGT) was just approved for funding! I believe that this is the press release, as witnessed by the exclamation mark [...]

  • Cern scientists reveal God Particle sounds just like Joe Pasquale

    Updated: 2010-06-25 10:43:42
    Scientists working at the Large Hadron Collider have expressed concern after new audio recognition s

  • Higgs Boson and LHCSound

    Updated: 2010-06-23 23:26:25
    Today, while waiting for files to render and cuts to be approved, I spent some time bouncing around

  • Hunting the God particles

    Updated: 2010-06-23 18:56:06
    God particle also called the Higgs boson One of objectives of the 27 KM in circumference Large Hadro

  • The sound of the Higgs boson

    Updated: 2010-06-23 17:22:36
    All matter is made up of atoms, and atoms are made of electrons, neutrons, and protons. Peter Higgs

  • So, what - It's like a Higgs boson ringtone?

    Updated: 2010-06-23 06:11:05
    Huh. Weird. I thought  they said there are probably like five, so if that is the case, do they plan

  • Fermilab experiment hints at 'multiple God particles'

    Updated: 2010-06-15 07:03:12
    (BBC News) – The idea of multiple Higgs bosons is supported by results gathered by the DZero e

  • Predictions From David Gross

    Updated: 2010-06-14 23:47:28
    Video of David Gross’s talk at the Physics at the LHC 2010 conference is now available. He devotes much of the talk to reviewing predictions he made back in 1993 of what would happen by 2008, and making new predictions for what will happen by 2020. The 1993 experimental predictions that didn’t work out could [...]

  • The Particle Zoo Subatomic Particle Softies

    Updated: 2010-06-07 14:58:52
    : 1 June 2010 2010 The Particle Zoo , LLC

  • OP Vistars

    Updated: 2010-06-07 14:57:54
    LIN PSB ISO_GPS ISO_HRS CPS ADE CPS_EAST CTF LEIR LHC1 LHC2 LHC_CONFIG LHC_Coordination LHC_CMS_Experiment LHC_Exp_Magnets LHCf Experiment LHC_OPERATION LHC_BEAM_DUMP SPS_PAGE1 SPS_SFTLONG SPS_CNGS SPS_LHC_HIGH SPS_LHC_LOW OP Vistars

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