Sommerfeld effect in heavy quark chemical equilibration

Bödeker D, Laine M (2013)
Journal of High Energy Physics 2013(1): 37.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The chemical equilibration of heavy quarks in a quark-gluon plasma proceeds via annihilation or pair creation. For temperatures T much below the heavy quark mass M, when kinetically equilibrated heavy quarks move very slowly, the annihilation in the colour singlet channel is enhanced because the quark and antiquark attract each other which increases their probability to meet, whereas the octet contribution is suppressed. This is the so-called Sommerfeld effect. It has not been taken into account in previous calculations of the chemical equilibration rate, which are therefore incomplete for T < alphas^2 M. We compute the leading-order equilibration rate in this regime/ there is a large enhancement in the singlet channel, but the rate is dominated by the octet channel, and therefore the total effect is small. In the course of the computation we demonstrate how operators that represent the annihilation of heavy quarks in non-relativistic QCD can be incorporated into the imaginary-time formalism.
Erscheinungsjahr
2013
Zeitschriftentitel
Journal of High Energy Physics
Band
2013
Ausgabe
1
Art.-Nr.
37
ISSN
1029-8479
eISSN
1029-8479
Page URI
https://pub.uni-bielefeld.de/record/2550985

Zitieren

Bödeker D, Laine M. Sommerfeld effect in heavy quark chemical equilibration. Journal of High Energy Physics. 2013;2013(1): 37.
Bödeker, D., & Laine, M. (2013). Sommerfeld effect in heavy quark chemical equilibration. Journal of High Energy Physics, 2013(1), 37. doi:10.1007/JHEP01(2013)037
Bödeker, Dietrich, and Laine, Mikko. 2013. “Sommerfeld effect in heavy quark chemical equilibration”. Journal of High Energy Physics 2013 (1): 37.
Bödeker, D., and Laine, M. (2013). Sommerfeld effect in heavy quark chemical equilibration. Journal of High Energy Physics 2013:37.
Bödeker, D., & Laine, M., 2013. Sommerfeld effect in heavy quark chemical equilibration. Journal of High Energy Physics, 2013(1): 37.
D. Bödeker and M. Laine, “Sommerfeld effect in heavy quark chemical equilibration”, Journal of High Energy Physics, vol. 2013, 2013, : 37.
Bödeker, D., Laine, M.: Sommerfeld effect in heavy quark chemical equilibration. Journal of High Energy Physics. 2013, : 37 (2013).
Bödeker, Dietrich, and Laine, Mikko. “Sommerfeld effect in heavy quark chemical equilibration”. Journal of High Energy Physics 2013.1 (2013): 37.
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arXiv: 1210.6153

Inspire: 1192938

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