Heavy quark medium polarization at next-to-leading order

Burnier Y, Laine M, Vepsaelaeinen M (2009)
JHEP 2009(02): 008.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
We compute the imaginary part of the heavy quark contribution to the photon polarization tensor, i.e. the quarkonium spectral function in the vector channel, at next-to-leading order in thermal QCD. Matching our result, which is valid sufficiently far away from the two-quark threshold, with a previously determined resummed expression, which is valid close to the threshold, we obtain a phenomenological estimate for the spectral function valid for all non-zero energies. In particular, the new expression allows to fix the overall normalization of the previous resummed one. Our result may be helpful for lattice reconstructions of the spectral function (near the continuum limit), which necessitate its high energy behaviour as input, and can in principle also be compared with the dilepton production rate measured in heavy ion collision experiments. In an appendix analogous results are given for the scalar channel.
Stichworte
Lattice QCD; Thermal Field Theory; Heavy Quark Physics; NLO Computations
Erscheinungsjahr
2009
Zeitschriftentitel
JHEP
Band
2009
Ausgabe
02
Art.-Nr.
008
ISSN
1029-8479
eISSN
1029-8479
Page URI
https://pub.uni-bielefeld.de/record/1634054

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Burnier Y, Laine M, Vepsaelaeinen M. Heavy quark medium polarization at next-to-leading order. JHEP. 2009;2009(02): 008.
Burnier, Y., Laine, M., & Vepsaelaeinen, M. (2009). Heavy quark medium polarization at next-to-leading order. JHEP, 2009(02), 008. https://doi.org/10.1088/1126-6708/2009/02/008
Burnier, Yannis, Laine, Mikko, and Vepsaelaeinen, M. 2009. “Heavy quark medium polarization at next-to-leading order”. JHEP 2009 (02): 008.
Burnier, Y., Laine, M., and Vepsaelaeinen, M. (2009). Heavy quark medium polarization at next-to-leading order. JHEP 2009:008.
Burnier, Y., Laine, M., & Vepsaelaeinen, M., 2009. Heavy quark medium polarization at next-to-leading order. JHEP, 2009(02): 008.
Y. Burnier, M. Laine, and M. Vepsaelaeinen, “Heavy quark medium polarization at next-to-leading order”, JHEP, vol. 2009, 2009, : 008.
Burnier, Y., Laine, M., Vepsaelaeinen, M.: Heavy quark medium polarization at next-to-leading order. JHEP. 2009, : 008 (2009).
Burnier, Yannis, Laine, Mikko, and Vepsaelaeinen, M. “Heavy quark medium polarization at next-to-leading order”. JHEP 2009.02 (2009): 008.
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arXiv: 0812.2105

Inspire: 804968

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