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arXiv · 1210.1064

Massive vector current correlator in thermal QCD

Y. Burnier·M. Laine
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Abstract

We present an NLO analysis of the massive vector current correlator at temperatures above a few hundred MeV. The physics of this correlator originates from a transport peak, related to heavy quark diffusion, and from the quark-antiquark threshold, related to quarkonium physics. In the bottom case both can be studied with separate effective theories, but for charm these may not be accurate, so a study within the full theory is needed. Working in imaginary time, the NLO correlator can be computed in unresummed perturbation theory; comparing with lattice data, we find good agreement. Subsequently we inspect how non-perturbative modifications of the transport peak would affect the imaginary-time correlator. The massive NLO quark-number susceptibility is also contrasted with numerical measurement.

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Y. Burnier, M. Laine. 2012-10-03. Massive vector current correlator in thermal QCD. https://doi.org/10.1007/jhep11(2012)086

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