Burnier, Yannis; Laine, Mikko Sakari (2013). Charm mass effects in bulk channel correlations. Journal of High Energy Physics, 2013(11), pp. 1-21. Springer 10.1007/JHEP11(2013)012
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The bulk viscosity of thermalized QCD matter at temperatures above a few hundred MeV could be significantly influenced by charm quarks because their contribution arises four perturbative orders before purely gluonic effects. In an attempt to clarify the challenges of a lattice study, we determine the relevant imaginary-time correlator (of massive scalar densities) up to NLO in perturbation theory, and compare with existing data. We find discrepancies much larger than in the vector channel; this may hint, apart from the importance of taking a continuum limit, to larger non-perturbative effects in the scalar channel. We also recall how a transport peak related to the scalar density spectral function encodes non-perturbative information concerning the charm quark chemical equilibration rate close to equilibrium.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Burnier, Yannis, Laine, Mikko Sakari |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
05 Jun 2014 16:21 |
Last Modified: |
05 Dec 2022 14:28 |
Publisher DOI: |
10.1007/JHEP11(2013)012 |
BORIS DOI: |
10.7892/boris.42209 |
URI: |
https://boris.unibe.ch/id/eprint/42209 |
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