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

 

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dc.contributor.advisor Horowitz, W A en_ZA
dc.contributor.author Kolbe, Isobel en_ZA
dc.date.accessioned 2016-07-07T09:52:33Z
dc.date.available 2016-07-07T09:52:33Z
dc.date.issued 2015 en_ZA
dc.identifier.citation Kolbe, I. 2015. Short path length pQCD corrections to energy loss in the quark gluon plasma. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/20249
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Theoretical Physics en_ZA
dc.title Short path length pQCD corrections to energy loss in the quark gluon plasma en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Physics en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Kolbe, 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/11427/20249 en_ZA
dc.identifier.chicagocitation Kolbe, 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/11427/20249 en_ZA
dc.identifier.vancouvercitation Kolbe 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/11427/20249 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


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