PARTICLE PHYSICS
... The very heavy top quark mass is “explained” in the theory by saying that the top quark has a very large coupling (interaction) with the Higgs field !!! (significantly larger than that of the W and Z bosons) All the other “matter” particles have much smaller couplings to the Higgs field and hence mu ...
... The very heavy top quark mass is “explained” in the theory by saying that the top quark has a very large coupling (interaction) with the Higgs field !!! (significantly larger than that of the W and Z bosons) All the other “matter” particles have much smaller couplings to the Higgs field and hence mu ...
Triaxial Atomic Nucleus
... In a data set consisting of 7- and 8-TeV collisions, 15 candidate events for this process were observed. While it may not seem like much, the expected background was considerably smaller, allowing the CMS team to claim that they have evidence of the process. (In the particle physics world, evidence ...
... In a data set consisting of 7- and 8-TeV collisions, 15 candidate events for this process were observed. While it may not seem like much, the expected background was considerably smaller, allowing the CMS team to claim that they have evidence of the process. (In the particle physics world, evidence ...
1.5 physics beyond the Standard Model
... known as the “hierarchy problem”, is puzzling and indicates that physics beyond the SM that protects the Higgs mass against large quantum corrections should exist in the multi-TeV regime. We investigated several approaches to solving the hierarchy problem, such as supersymmetry (SUSY) and conformal ...
... known as the “hierarchy problem”, is puzzling and indicates that physics beyond the SM that protects the Higgs mass against large quantum corrections should exist in the multi-TeV regime. We investigated several approaches to solving the hierarchy problem, such as supersymmetry (SUSY) and conformal ...
The Higgs Boson: Reality or Mass Illusion
... through the Lagrangian density... lots o’ math... describes vector waves whose quanta have (bare) mass.’5 (Lagrangian Mechanics, or Gauge Theory, is a method of predicting an object’s location as it moves through space, and was chosen by Einstein as the foundation for his ‘General Theory of Relativi ...
... through the Lagrangian density... lots o’ math... describes vector waves whose quanta have (bare) mass.’5 (Lagrangian Mechanics, or Gauge Theory, is a method of predicting an object’s location as it moves through space, and was chosen by Einstein as the foundation for his ‘General Theory of Relativi ...
Screen-Based Graphic Design: Tips for non
... – The Higgs Boson was expected have a rest mass up to > 1TeV/c2 – Head-on collisions between protons at energies ~20TeV are required to produce a Higgs Boson.Such energies can only be achieved by particle accelerators like the Large Hadron Collider at CERN – The Higgs Boson was found in July 2012 at ...
... – The Higgs Boson was expected have a rest mass up to > 1TeV/c2 – Head-on collisions between protons at energies ~20TeV are required to produce a Higgs Boson.Such energies can only be achieved by particle accelerators like the Large Hadron Collider at CERN – The Higgs Boson was found in July 2012 at ...
FEL and Accelerator Physics
... Effect is based on the dependence at the Compton scattering cross section on the initial electron (positron) polarization. In the case of hard photons the spin dependence is used to knock out mainly certain helicity from an electron beam in a single scattering. This method enables one to achieve ver ...
... Effect is based on the dependence at the Compton scattering cross section on the initial electron (positron) polarization. In the case of hard photons the spin dependence is used to knock out mainly certain helicity from an electron beam in a single scattering. This method enables one to achieve ver ...
kinematics, units, etc
... For the case where there is no energy loss in the CMS, t is negative. If the exchanged particle were a real physical particle, t would represent its mass-squared (which must be positive). Therefore the exchanged particle is VIRTUAL or “off the mass shell”. This type of event for which t < 0 is calle ...
... For the case where there is no energy loss in the CMS, t is negative. If the exchanged particle were a real physical particle, t would represent its mass-squared (which must be positive). Therefore the exchanged particle is VIRTUAL or “off the mass shell”. This type of event for which t < 0 is calle ...
Option 212: UNIT 2 Elementary Particles - X
... – The Higgs Boson was expected have a rest mass up to > 1TeV/c2 – Head-on collisions between protons at energies ~20TeV are required to produce a Higgs Boson.Such energies can only be achieved by particle accelerators like the Large Hadron Collider at CERN – The Higgs Boson was found in July 2012 ...
... – The Higgs Boson was expected have a rest mass up to > 1TeV/c2 – Head-on collisions between protons at energies ~20TeV are required to produce a Higgs Boson.Such energies can only be achieved by particle accelerators like the Large Hadron Collider at CERN – The Higgs Boson was found in July 2012 ...
4–momentum transfer and the kinematics of two body scattering
... produce final state particles that are moving. This is because of an argument having to do with phase space which you may well be about to come across in solid state physics, when studying the Debye model of specific heat and the density of states! Think of the momenta of the two final state particl ...
... produce final state particles that are moving. This is because of an argument having to do with phase space which you may well be about to come across in solid state physics, when studying the Debye model of specific heat and the density of states! Think of the momenta of the two final state particl ...
Report of PAC for Particle Physics
... simulated ATLAS DC1 and DC2 data. They rely on the Higgs boson production via the Vector Boson Fusion mechanism (the two accompanying forward jets allow very good background reduction) and on the maximal Higgs boson decay rates into WW- or ZZ-pair at MHIGGS = 400 -- 1000 GeV. ...
... simulated ATLAS DC1 and DC2 data. They rely on the Higgs boson production via the Vector Boson Fusion mechanism (the two accompanying forward jets allow very good background reduction) and on the maximal Higgs boson decay rates into WW- or ZZ-pair at MHIGGS = 400 -- 1000 GeV. ...
Large Hadron Collider
The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider, the largest, most complex experimental facility ever built, and the largest single machine in the world. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries, as well as hundreds of universities and laboratories. It lies in a tunnel 27 kilometres (17 mi) in circumference, as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva, Switzerland. Its first research run took place from 30 March 2010 to 13 February 2013 at an initial energy of 3.5 teraelectronvolts (TeV) per beam (7 TeV total), almost 4 times more than the previous world record for a collider, rising to 4 TeV per beam (8 TeV total) from 2012. On 13 February 2013 the LHC's first run officially ended, and it was shut down for planned upgrades. 'Test' collisions restarted in the upgraded collider on 5 April 2015, reaching 6.5 TeV per beam on 20 May 2015 (13 TeV total, the current world record for particle collisions). Its second research run commenced on schedule, on 3 June 2015.The LHC's aim is to allow physicists to test the predictions of different theories of particle physics, high-energy physics and in particular, to prove or disprove the existence of the theorized Higgs boson and the large family of new particles predicted by supersymmetric theories, and other unsolved questions of physics, advancing human understanding of physical laws. It contains seven detectors, each designed for certain kinds of research. The proton-proton collision is the primary operation method, but the LHC has also collided protons with lead nuclei for two months in 2013 and used lead–lead collisions for about one month each in 2010, 2011, and 2013 for other investigations. The LHC's computing grid was (and currently is) a world record holder. Data from collisions was anticipated to be produced at an unprecedented rate for the time, of tens of petabytes per year, a major challenge at the time, to be analysed by a grid-based computer network infrastructure connecting 140 computing centers in 35 countries – by 2012 the Worldwide LHC Computing Grid was also the world's largest distributed computing grid, comprising over 170 computing facilities in a worldwide network across 36 countries.