Short path length pQCD corrections to energy loss in the quark gluon plasma

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dc.contributor.advisorHorowitz, W Aen_ZA
dc.contributor.authorKolbe, Isobelen_ZA
dc.date.accessioned2016-07-07T09:52:33Z
dc.date.available2016-07-07T09:52:33Z
dc.date.issued2015en_ZA
dc.description.abstractRecent surprising discoveries of collective behaviour of low-pT particles in pA collisions at LHC hint at the creation of a hot, uid-like QGP medium. The seemingly conflicting measurements of non-zero particle correlations and RpA that appears to be consistent with unity demand a more careful analysis of the mechanisms at work in such ostensibly minuscule systems. We study the way in which energy is dissipated in the QGP created in pA collisions by calculating, in pQCD, the short separation distance corrections to the well-known DGLV energy loss formulae that have produced excellent predictions for AA collisions. We find that, shockingly, due to the large formation time (compared to the 1/μ Debye screening length) assumption that was used in the original DGLV calculation, a highly non-trivial cancellation of correction terms results in a null short path length correction to the DGLV energy loss formula. We investigate the e ect of relaxing the large formation time assumption in the final stages of the calculation - doing so throughout the calculation adds immense calculational complexity - and find, since the separation distance between production and scattering centre is integrated over from 0 to ∞, ≿ 100% corrections, even in the large path length approximation employed by DGLV.en_ZA
dc.identifier.apacitationKolbe, I. (2015). <i>Short path length pQCD corrections to energy loss in the quark gluon plasma</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/20249en_ZA
dc.identifier.chicagocitationKolbe, Isobel. <i>"Short path length pQCD corrections to energy loss in the quark gluon plasma."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 2015. http://hdl.handle.net/11427/20249en_ZA
dc.identifier.citationKolbe, I. 2015. Short path length pQCD corrections to energy loss in the quark gluon plasma. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Kolbe, Isobel AB - Recent surprising discoveries of collective behaviour of low-pT particles in pA collisions at LHC hint at the creation of a hot, uid-like QGP medium. The seemingly conflicting measurements of non-zero particle correlations and RpA that appears to be consistent with unity demand a more careful analysis of the mechanisms at work in such ostensibly minuscule systems. We study the way in which energy is dissipated in the QGP created in pA collisions by calculating, in pQCD, the short separation distance corrections to the well-known DGLV energy loss formulae that have produced excellent predictions for AA collisions. We find that, shockingly, due to the large formation time (compared to the 1/μ Debye screening length) assumption that was used in the original DGLV calculation, a highly non-trivial cancellation of correction terms results in a null short path length correction to the DGLV energy loss formula. We investigate the e ect of relaxing the large formation time assumption in the final stages of the calculation - doing so throughout the calculation adds immense calculational complexity - and find, since the separation distance between production and scattering centre is integrated over from 0 to ∞, ≿ 100% corrections, even in the large path length approximation employed by DGLV. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Short path length pQCD corrections to energy loss in the quark gluon plasma TI - Short path length pQCD corrections to energy loss in the quark gluon plasma UR - http://hdl.handle.net/11427/20249 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20249
dc.identifier.vancouvercitationKolbe I. Short path length pQCD corrections to energy loss in the quark gluon plasma. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/20249en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherTheoretical Physicsen_ZA
dc.titleShort path length pQCD corrections to energy loss in the quark gluon plasmaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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