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 Sarkar21 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
