Mesonic correlation lengths in high temperature QCD - INSPIRE

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Mesonic correlation lengths in high temperature QCD

M. Laine
(
- Bielefeld U.
)
,
M. Vepsalainen
(
- Helsinki U. and
- Helsinki Inst. of Phys.
)

Nov, 2003

24 pages

Published in:

JHEP 02 (2004) 004

e-Print:

hep-ph/0311268 [hep-ph]

DOI:

10.1088/1126-6708/2004/02/004

Report number:

BI-TP-2003-31,
HIP-2003-58-TH

View in:

ADS Abstract Service

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Abstract:

We consider spatial correlation lengths \xi for various QCD light quark bilinears at temperatures above a few hundred MeV. Some of the correlation lengths (such as that related to baryon density) coincide with what has been measured earlier on from glueball-like states: others do not couple to glueballs, and have a well-known perturbative leading-order expression as well as a computable next-to-leading-order correction. We determine the latter following analogies with the NRQCD effective theory, used for the study of heavy quarkonia at zero temperature: we find (for the quenched case) \xi^{-1} = 2 \pi T + 0.1408 g^2 T, and compare with lattice results. One manifestation of U_A(1) symmetry non-restoration is also pointed out.

quantum chromodynamics
temperature: high
meson: two-point function
correlation: length
glueball
quantum chromodynamics: nonrelativistic
effective Lagrangian
perturbation theory
lattice field theory
bibliography

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