Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 9, Pages -Publisher
SPRINGER
DOI: 10.1088/1126-6708/2008/09/015
Keywords
lattice QCD; thermal field theory; hadronic colliders; QCD
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Funding
- Natural Sciences and Engineering Research Council of Canada
- Tomlinson postdoctoral fellowship at McGill University
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We examine the behavior of the spectral function for the T-mu(mu) operator in QCD in the two regimes where it is possible to make analytical progress; weak coupling, and close to a second order QCD phase transition. We determine the behavior of the bulk viscosity in each regime. We discuss the problem of analytic continuation of the (lattice) Euclidean correlation function to determine the spectral function. In each case the spectral function has a narrow peak at small frequency; its shape would be challenging to extract accurately from lattice data with error bars.
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