About LHsee LHsee is an educational tool available for Android OS mobile smartphones and tablet PCs. It has been custom designed to provide an accurate and interactive visual representation of complex high-energy physics events recorded by the ATLAS detector. Features include live streaming and reconstruction of collision data from the CERN Large Hadron Collider. The… [Read more…]
May 3, 2012
http://youtu.be/_NMqPT6oKJ8 http://youtu.be/lVefgfmFg9o
April 7, 2012
Igor I. Smolyaninov As demonstrated by Chernodub, strong magnetic field forces vacuum to develop real condensates of electrically charged rho mesons, which form an anisotropic inhomogeneous superconducting state similar to Abrikosov vortex lattice. As far as electromagnetic field behaviour is concerned, this state of vacuum constitutes a hyperbolic metamaterial [1]. Here we demonstrate that spatial… [Read more…]
April 5, 2012
The LHC has started proton collisions at the unprecedent energy of 4 TeV per beam. This video celebrates the new milestone and explains the physics challenges and ecxpectations for the two larger experiments ATLAS and CMS through the words of the current physics coordinators Richard Hawkings and Greg Landsberg. cdsweb.cern.ch Read more: cdsweb.cern.ch/record/1435792
February 14, 2012
Scientists at the Large Hadron Collider (LHC) will increase the energies of the bunches of subatomic particles called protons that it smashes together. The boost should improve the collider’s chances of discovering “new physics” and definitively confirming or denying the existence of Higgs boson particle. The proton beams’ energies will be increased by 14%, for… [Read more…]
February 13, 2012
Professor Jon Butterworth, member of the High Energy Physics group on the Atlas experiment, provides an overview of his work at the Large Hadron Collider (LHC).
February 9, 2012
In December 2011, the elusive Higgs boson was back in the limelight when hints of the particle emerged in the wreckage of proton collisions at the world’s most powerful particle smasher – the Large Hadron Collider (LHC) near Geneva, Switzerland. There have been no new collisions since, but researchers from the LHC’s two main detectors… [Read more…]
January 17, 2012
L. Bellagamba, R. Casadio, R. Di Sipio, V. Viventi We investigate possible signatures of black hole events at the LHC in the hypothesis that such objects will not evaporate completely, but leave a stable remnant. For the purpose of defining a reference scenario, we have employed the publicly available Monte Carlo generator CHARYBDIS2, in which… [Read more…]
December 23, 2011
W.-D. Schlatter (CERN), P. M. Zerwas (DESY) After a brief introduction to the theoretical basis of the Higgs mechanism for generating the masses of elementary particles, the experimental searches for Higgs particles will be summarized, from bounds at LEP to inferences for LHC. The report will focus on the Standard Model, though some central results… [Read more…]
December 22, 2011
The Large Hadron Collider (LHC) on the Franco-Swiss border has made its first clear observation of a new particle since opening in 2009. Known as Chi-b (3P), it is a boson – the label given to particles that can carry the forces of nature. The as-yet unpublished discovery isreported on the Arxiv pre-print server. The… [Read more…]
November 15, 2011
Read also: 1. LHCb uses charm to find asymmetry 2.LHCb has evidence of new physics! Maybe 3. New Physics at LHC? An Anomaly in CP Violation By Jason Palmer Large Hadron Collider researchers have shown off what may be the facility’s first “new physics” outside our current understanding of the Universe. Particles called D-mesons seem… [Read more…]
November 9, 2011
Marcus Bleicher, Piero Nicolini, Martin Sprenger, Elizabeth Winstanley The possibility of creating microscopic black holes is one of the most exciting predictions for the LHC, with potentially major consequences for our current understanding of physics. We briefly review the theoretical motivation for micro black hole production, and our understanding of their subsequent evolution. Recent work… [Read more…]
October 31, 2011
Geneva, 31 October 2011. After some 180 days of running and four hundred trillion (4×1014) proton proton collisions, the LHC’s 2011 proton run came to an end at 5.15pm yesterday evening. For the second year running, the LHC team has largely surpassed its operational objectives, steadily increasing the rate at which the LHC has delivered… [Read more…]
October 20, 2011
Matt Strassler From the CMS talk at Berkeley; I’ve added the red dots and excised the low-statistics four-lepton results. Table of numbers of events at CMS in various categories. MET is a measure of whether invisible particles are present; HT is a measure of how much energy is in visible particles. No-OSSF means that if… [Read more…]
October 9, 2011
For almost 20 years, Bill Murray has been hunting the Higgs boson, the elusive subatomic particle that is thought to give mass to the basic building blocks of nature. In those two decades, the 45-year-old Edinburgh-born researcher has watched the search for the holy grail of physics narrow to a tighter and tighter group of… [Read more…]
October 8, 2011
LHSee: discover what happen at the LHC. Want to find out how to Hunt the Higgs Boson using your phone? Ever wondered how the Large Hadron Collider experiments work, and what the collisions look like? Scientists at the world’s biggest scientific experiment – the Large Hadron Collider at CERN, Geneva – are trying to answer… [Read more…]
September 29, 2011
CERN’s Large Hadron Collider is finally up and running, but the lab is already planning an audacious upgrade using technology not yet invented, as Matthew Chalmers reports It is hard to imagine upgrading an instrument as big and complex as the SwFr6.5bn (€10bn) Large Hadron Collider (LHC) at the CERN particle-physics lab near Geneva. The… [Read more…]
September 16, 2011
Signals reported in July seemed to indicate that the Higgs boson – a long-theorised particle seen as a missing link in our current understanding of physics – might have been detected among data the Large Hadron Collider at CERN in Geneva. But since then, those signals – hinting that the theoretical ‘God’ particle might have… [Read more…]
September 14, 2011
The Large Hadron Collider fired mankind into a “new era of science” in March last year producing the world’s first highenergy particle collision. After years of setbacks, the £4.4billion machine has been smashing together protons using three times the speed and energy of previous experiments. The collider, which is housed at the European Centre for… [Read more…]
September 6, 2011
U.S.-based physicists said on Monday they hope to have enough data by the end of this month to establish if the elusive Higgs boson, a particle thought to have made the universe possible, exists in its long-predicted form. If the answer is no, scientists around the globe will have to rethink the 40-year-old Standard Model… [Read more…]
August 29, 2011
Despite the hopes of most and the preconceptions of many, news from the Lepton-Photon conference in Mumbay, India, report that the Standard Model is as alive and strong as it has ever been. Indeed, the recent searches for Supersymmetry by ATLAS and CMS, now analyzing datasets that by all standards must be considered “a heck… [Read more…]
August 27, 2011
By Pallab Ghosh Results from the Large Hadron Collider (LHC) have all but killed the simplest version of an enticing theory of sub-atomic physics. Researchers failed to find evidence of so-called “supersymmetric” particles, which many physicists had hoped would plug holes in the current theory. Theorists working in the field have told BBC News that… [Read more…]
August 22, 2011
Cern scientist says he sees ‘no striking evidence of anything that could resemble a discovery’ in hunt for Higgs boson Ripples of excitement swept through the physics community last month when Cern scientists reported what looked like glimpses of the long-sought Higgs boson. But the hopes have been dashed as it was revealed that the tantalising hints had all but… [Read more…]
August 8, 2011
The W boson carries the weak nuclear force. At the Large Hadron Collider pairs of them may be showing the first signs of the Higgs boson. But they are a decidedly mixed blessing. The current data from the LHC show an effect which might, or might not, be the first indication of the presence of… [Read more…]
August 1, 2011
…Scientists produce computer images of particle explosions similar to the greatest ever galactic light show It may look like a firework display in the night sky but these explosive images could be the closest we have yet come to snapshot from the birth of the universe itself. The computer generated images are the result of… [Read more…]
July 24, 2011
A US particle machine has seen possible hints of the Higgs boson, it has emerged, after reports this week of similar glimpses at Europe’s Large Hadron Collider (LHC) laboratory. The Higgs boson sub-atomic particle is a missing cornerstone in the accepted theory of particle physics. Researchers have been analysing data from the Tevatron machine near… [Read more…]
July 22, 2011
Unusual data bumps detected by two teams at Large Hadron Collider thought to be glimpse of elusive source of particle mass Scientists may have caught their first glimpse of the elusiveHiggs boson, or “God particle”, which is thought to give mass to the basic building blocks of nature. Researchers at the Large Hadron Collider at… [Read more…]
June 25, 2011
P. Cea, L. Cosmai We further elaborate on the triviality and spontaneous symmetry breaking scenario where the Higgs boson without self-interaction coexists with spontaneous symmetry breaking. The trivial Higgs boson is rather heavy with mass m_H = 754 +/- 20 (stat) +/- 20 (syst) GeV and total width \Gamma(H) \simeq 320 GeV. We briefly discuss… [Read more…]
June 18, 2011
Geneva, 17 June 2011. Today at around 10:50 CEST, the amount of data accumulated by LHC experiments ATLAS and CMS clicked over from 0.999 to 1 inverse femtobarn, signalling an important milestone in the experiments’ quest for new physics. The number signifies a quantity physicists call integrated luminosity, which is a measure of the total… [Read more…]
June 15, 2011
I am sitting in the CERN review meeting where the ATLAS and CMS experiments have just reported that they have passed a major milestone six months early. After the planning meeting at the beginning of the year, the people responsible for running the Large Hadron Collider announced that their target was to deliver one inverse femtobarn… [Read more…]
June 14, 2011
CMS has recently produced an updated search for black hole production in the 7 TeV proton-proton collisions delivered by the LHC. The data sample now consists of 190 inverse picobarns of collisions collected in 2011, and the limits set on black hole production are more stringent. The search uses a variable called “S_T”, which is… [Read more…]
May 24, 2011
….”100 Million Collisions per Second” European Organization for Nuclear Research (CERN) scientists look at computer screens showing traces on the Atlas experiment of the first protons injected in the Large Hadron Collider (LHC) during its switch-on operation in 2008 near Geneva. It set a new record early Monday, a feat that should accelerate the quest… [Read more…]
May 12, 2011
NEW particles that mimic the long-sought Higgs boson may bamboozle physicists, who could spend years trying to confirm or rule out the possibility of an impostor, a new study warns. The standard model of particle physics predicts that a particle called the Higgs boson endows many other particles with mass. The Large Hadron Collider (LHC) at CERN… [Read more…]
May 4, 2011
Now you see it, now you don’t. Rather like a conjurer’s white rabbit, the elusive Higgs boson may have slipped from sight again. A recent report hinted at a glimpse of the long-sought particle at a major detector at the Large Hadron Collider (LHC) at CERN near Geneva, Switzerland. But a second detector has now… [Read more…]
April 30, 2011
Abstract: The first year of LHC data taking provided an integrated luminosity of about 35/pb in proton-proton collisions at sqrt(s)=7 TeV. The accelerator and the experiments have demonstrated an excellent performance. The experiments have obtained important physics results in many areas, ranging from tests of the Standard Model to searches for new particles. Among other results… [Read more…]
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May 30, 2012
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