Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 72, Issue 2, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-012-1902-8
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Funding
- BMBF [06BI9002]
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By subtracting from a recent lattice measurement of the thermal vector-current correlator the known 5-loop vacuum contribution, we demonstrate that the remainder is small and shows no visible short-distance divergence. It can therefore in principle be subjected to model-independent analytic continuation. Testing a particular implementation, we obtain estimates for the flavour-diffusion coefficient (2 pi TD greater than or similar to 0.8) and electrical conductivity which are significantly smaller than previous results. Although systematic errors remain beyond control at present, some aspects of our approach could be of a wider applicability.
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