TY - JOUR
T1 - Comparing the drag force on heavy quarks in N=4 super-Yang-Mills theory and QCD
AU - Gubser, Steven S.
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2007/12/4
Y1 - 2007/12/4
N2 - Computations of the drag force on a heavy quark moving through a thermal state of strongly coupled N=4 super-Yang-Mills theory have appeared recently. I compare the strength of this effect between N=4 gauge theory and QCD, using the static force between external quarks to normalize the 't Hooft coupling. Comparing N=4 and QCD at fixed energy density then leads to a relaxation time of roughly 2fm/c for charm quarks moving through a quark-gluon plasma at T=250MeV. This estimate should be regarded as preliminary because of the difficulties of comparing two such different theories.
AB - Computations of the drag force on a heavy quark moving through a thermal state of strongly coupled N=4 super-Yang-Mills theory have appeared recently. I compare the strength of this effect between N=4 gauge theory and QCD, using the static force between external quarks to normalize the 't Hooft coupling. Comparing N=4 and QCD at fixed energy density then leads to a relaxation time of roughly 2fm/c for charm quarks moving through a quark-gluon plasma at T=250MeV. This estimate should be regarded as preliminary because of the difficulties of comparing two such different theories.
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U2 - 10.1103/PhysRevD.76.126003
DO - 10.1103/PhysRevD.76.126003
M3 - Article
AN - SCOPUS:36849019408
SN - 1550-7998
VL - 76
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 12
M1 - 126003
ER -