Eur. Phys. J. C 25, 445-452 (2002)
DOI: 10.1007/s10052-002-01007-x

Vector and axial-vector mesons at finite temperature

S. Mallik¹ and Sourav Sarkar<sup>2

1</sup>  Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata-700064, India
²  Variable Energy Cyclotron Centre, 1/AF, Bidhannagar, Kolkata-700064, India

(Received: 30 May 2002 / Published online: 30 August 2002 )

Abstract
We consider the thermal correlation functions of vector and axial-vector currents and evaluate corrections to the vector and axial-vector meson pole terms to one loop in chiral perturbation theory. As expected, the pole positions do not shift to leading order in temperature. But the residues decrease with temperature. We review briefly other methods in the literature to determine these pole parameters. We find our evaluation to disprove a result on the mixing of the correlation functions at finite temperature.

© Società Italiana di Fisica, Springer-Verlag 2002