Summary: Nuclear Physics B 726 (2005) 93­108
Continuum and lattice meson spectral functions
at nonzero momentum and high temperature
Gert Aarts a
, Jose M. Martínez Resco b
a Department of Physics, University of Wales Swansea, Singleton Park, Swansea, SA2 8PP, United Kingdom
b Department of Physics & Astronomy, Brandon University, Brandon, Manitoba R7A 6A9, Canada
Received 5 July 2005; accepted 4 August 2005
Available online 29 August 2005
Abstract
We analyse discretization effects in the calculation of high-temperature meson spectral functions at
nonzero momentum and fermion mass on the lattice. We do so by comparing continuum and lattice spec-
tral functions in the infinite temperature limit. Complete analytical results for the spectral densities in the
continuum are presented, along with simple expressions for spectral functions obtained with Wilson and
staggered fermions on anisotropic lattices. We comment on the use of local and point split currents.
2005 Elsevier B.V. All rights reserved.
PACS: 11.15.Ha; 11.10.Wx
1. Introduction
Motivated by the experimental progress in relativistic heavy ion collisions and the recreation
of the quark­gluon plasma, several questions have received substantial attention in the past few

Source: Aarts, Gert - Department of Physics, University of Wales Swansea

Collections: Physics