Gluon propagator in classical color field of colliding hadrons and its implications for hadronic cross sections

dc.contributor.advisorChiu, Charlesen
dc.contributor.committeeMemberDicus, Duaneen
dc.contributor.committeeMemberGonzalez, Oscaren
dc.contributor.committeeMemberMarkert, Christinaen
dc.contributor.committeeMemberSudarshan, E. C. Georgeen
dc.creatorCheung, Man-Fungen
dc.date.accessioned2011-09-28T15:00:46Zen
dc.date.available2011-09-28T15:00:46Zen
dc.date.issued2011-08en
dc.date.submittedAugust 2011en
dc.date.updated2011-09-28T15:00:56Zen
dc.descriptiontexten
dc.description.abstractWe review the Regge theory and the minijet model for pp and pp collisions. We show that, in the conventional minijet approach, the asymptotic behavior of the total cross section calculated using currently accepted gluon distribution function and perturbative QCD rises too rapidly when compared with the data and fails to satisfy Froissart bound. To tame the rise, we have developed a new formalism for the interaction between QCD gluon and the classical color field of the colliding nucleons, and show how the gluon propagator is modified. The corresponding gauge invariance condition of the propagator is derived and shown to be satisfied. The modified gluon propagator leads to a suppression of the minijet cross section due to the gg [rightwards arrow] gg sub-process in the small-x region. We show that the pp and pp total cross section from [square root]s = 5 GeV to 30 TeV can be described as a sum of a hard component contributed by the classical field modified minijet model and a soft component due to the exchange of the Pomeron and the I=0 exchange-degenerate [omega] and f Regge trajectories. The soft-component model is motivated by the notion of duality. The predicted total cross section has a ln s asymptotic behavior.en
dc.description.departmentPhysicsen
dc.format.mimetypeapplication/pdfen
dc.identifier.slug2152/ETD-UT-2011-08-4142en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-08-4142en
dc.language.isoengen
dc.subjectQCDen
dc.subjectMinijeten
dc.subjectGluon saturationen
dc.subjectTotal cross sectionen
dc.subjectHigh energy physicsen
dc.subjectHadronic physicsen
dc.titleGluon propagator in classical color field of colliding hadrons and its implications for hadronic cross sectionsen
dc.type.genrethesisen
thesis.degree.departmentPhysicsen
thesis.degree.disciplinePhysicsen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen
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