Heavy quark chemical equilibration rate as a transport coefficient

Bödeker D, Laine M (2012)
JHEP 2012(7).

Journal Article | Published | English

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Abstract
Motivated by indications that heavy (charm and bottom) quarks interactstrongly at temperatures generated in heavy ion collision experiments, wesuggest a non-perturbative definition of a heavy quark chemical equilibrationrate as a transport coefficient. Within leading-order perturbation theory(corresponding to 3-loop level), the definition is argued to reduce to anexpression obtained from the Boltzmann equation. Around T ~ 400 MeV, anorder-of-magnitude estimate for charm yields a rate Gamma^{-1}_{chem} > 60 fm/cwhich remains too slow to play a practical role in current experiments.However, the rate increases rapidly with T and, due to non-linear effects, alsoif the initial state contains an overabundance of heavy quarks.
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Bödeker D, Laine M. Heavy quark chemical equilibration rate as a transport coefficient. JHEP. 2012;2012(7).
Bödeker, D., & Laine, M. (2012). Heavy quark chemical equilibration rate as a transport coefficient. JHEP, 2012(7).
Bödeker, D., and Laine, M. (2012). Heavy quark chemical equilibration rate as a transport coefficient. JHEP 2012.
Bödeker, D., & Laine, M., 2012. Heavy quark chemical equilibration rate as a transport coefficient. JHEP, 2012(7).
D. Bödeker and M. Laine, “Heavy quark chemical equilibration rate as a transport coefficient”, JHEP, vol. 2012, 2012.
Bödeker, D., Laine, M.: Heavy quark chemical equilibration rate as a transport coefficient. JHEP. 2012, (2012).
Bödeker, Dietrich, and Laine, Mikko. “Heavy quark chemical equilibration rate as a transport coefficient”. JHEP 2012.7 (2012).
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