Comparing the drag force on heavy quarks in N=4 super-Yang-Mills theory and QCD

Steven S. Gubser

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish (US)
Article number126003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume76
Issue number12
DOIs
StatePublished - Dec 4 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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