Temperature dependence of rho- and a_1-meson masses and mixing of vector and axial-vector correlators

Details Temperature dependence of rho- and a_1-meson masses and mixing of vector and axial-vector correlators Temperature dependence of rho- and a_1-meson masses and mixing of vector and axial-vector correlators

2001-10-03

arxiv.org/abs/nucl-th/0110005v1

Phys.Rev.Lett. 88 (2002) 042002

Physics

Nuclear Physics

Nuclear Theory

4 pages, 5 figures, Revtex 4

Scientific paper

10.1103/PhysRevLett.88.042002

Within a chiral model which provides a good description of the properties of rho and a_1 mesons in vacuum, it is shown that, to order T^2, the rho- and a_1-meson masses remain constant in the chiral limit, even if at tree level they are proportional to the chiral condensate, sigma_0. Numerically, the temperature dependence of the masses turns out to be small also for realistic parameter sets and high temperatures. The weak temperature dependence of the masses is consistent with the Eletsky-Ioffe mixing theorem, and traces of mixing effects can be seen in the spectral function of the vector correlator at finite temperature.

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