An AdS/CFT Calculation of Screening in a Hot Wind

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dc.creatorLiu, Hong
dc.creatorRajagopal, Krishna
dc.creatorWiedemann, Urs Achim
dc.date2006-07-06
dc.date2006-12-11
dc.date.accessioned2026-07-07T11:27:01Z
dc.date.available2026-07-07T11:27:01Z
dc.descriptionOne of the challenges in relating experimental measurements of the suppression in the number of J/ψmesons produced in heavy ion collisions to lattice QCD calculations is that whereas the lattice calculations treat J/ψmesons at rest, in a heavy ion collision a c\bar c pair can have a significant velocity with respect to the hot fluid produced in the collision. The putative J/ψfinds itself in a hot wind. We present the first rigorous non-perturbative calculation of the consequences of a wind velocity v on the screening length L_s for a heavy quark-antiquark pair in hot N=4 supersymmetric QCD. We find L_s(v,T) = f(v)[1-v^2]^{1/4}/πT with f(v) only mildly dependent on v and the wind direction. This L_s(v,T)\sim L_s(0,T)/\sqrtγ velocity scaling, if realized in QCD, provides a significant additional source of J/Ψsuppression at transverse momenta which are high but within experimental reach.
dc.description5 pages, 3 figures. v3: Significant additions, including a new figure, giving an illustrative example of the effect of the velocity scaling of the screening length on J/Psi suppression in heavy ion collisions
dc.identifierhttps://arxiv.org/abs/hep-ph/0607062
dc.identifierhttp://arxiv.org/abs/hep-ph/0607062
dc.identifierPhys.Rev.Lett.98:182301,2007
dc.identifierdoi:10.1103/PhysRevLett.98.182301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196018
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.subjectNuclear Theory
dc.titleAn AdS/CFT Calculation of Screening in a Hot Wind
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