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Collider ¦Ã¦Ã ¡ú (?) Process. Lhc The Electroweak Amendment

Posted on:2012-05-22Degree:MasterType:Thesis
Country:ChinaCandidate:N LiuFull Text:PDF
GTID:2210330335976352Subject:Particle Physics and Nuclear Physics
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Content: Over the past few decades, physicists continueto deepen in the details of elementary particles and theirinteractions constitute the universe of understanding. People through a relatively simple, unified theory to describeElectromagnetic interaction and weak interaction, while QCD deeply describes the strong interaction has beenthe"standard model"By deepening the understanding of elementary particles in particle physics to the"standardmodel"has become more plentiful, but this model, there are still some gaps, so that we can not draw a completepicture. To help scientists reveal the critical particle physics mysteries such, Requires a lot of experimental datato support, so"the data provide"the responsibility for the Large Hadron Collider responsible for them, and thisis very important in physics step. Firstly, the standard model of elementary particles and were reviewed overall, avery successful standard model of particle physics theory. A significant fraction of pp collisions at the LHC willinvolve (quasi-real) photon interactions occurring at energies well beyond the electroweak energy scale. Hence,the LHC can to some extend be considered as a high-energy photon-photon or photon-proton collider. This offers aunique possibility for novel and complementary research where the available effective luminosity is small, relativeto parton-parton interactions, but it is compensated by better known initial conditions and usually simpler finalstates. This is in a way a method for approaching some of the issues to be addressed by the future lepton collider.Such studies of photon interactions are possible at the LHC, thanks to the striking experimental signatures ofevents involving photon exchanges, in particular the presence of very forward scattered protons. We calculated theequivalent photon approximation of the LHC collider pp(γγâ†'tt)pp The process of electroweak correction. Theresults show that: pp(γγâ†'tt)pp process the amended section is relatively small, but the electroweak correctionEffect is high to reach ?7% or so. Therefore, the background for the LHC collider is very clean pp(γγâ†'tt)ppprocess , The electroweak correction effect can not be ignored.
Keywords/Search Tags:Standard Model, LHC collider, two-photon interaction the electroweak correction
PDF Full Text Request
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