TY  - JOUR
A1  - Philipsen, Owe
A1  - Schäfer, Christian
T1  - The second order hydrodynamic transport coefficient κ for the gluon plasma from the lattice
T2  - Journal of high energy physics
N2  - The quark gluon plasma produced in heavy ion collisions behaves like an almost ideal fluid described by viscous hydrodynamics with a number of transport coefficients. The second order coefficient κ is related to a Euclidean correlator of the energy-momentum tensor at vanishing frequency and low momentum. This allows for a lattice determination without maximum entropy methods or modelling, but the required lattice sizes represent a formidable challenge. We calculate κ in leading order lattice perturbation theory and simulations on 1203 × 6, 8 lattices with a < 0.1 fm. In the temperature range 2Tc − 10Tc we find κ = 0.36(15)T2. The error covers both a suitably rescaled AdS/CFT prediction as well as, remarkably, the result of leading order perturbation theory. This suggests that appropriate noise reduction methods on the lattice and NLO perturbative calculations could provide an accurate QCD prediction in the near future.
KW  - Quark-gluon Plasmap
KW  - Lattice QCD
KW  - Lattice gauge field theories
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/45206
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-452062
SN  - 1029-8479
SN  - 1126-6708
N1  - Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
VL  - 3
SP  - 1
EP  - 22
PB  - Springer ; SISSA
CY  - Berlin ; Heidelberg ; [Trieste]
ER  -