Role of axial-vector mesons near the chiral phase transition

Details Role of axial-vector mesons near the chiral phase transition Role of axial-vector mesons near the chiral phase transition

2009-01-07

arxiv.org/abs/0901.0842v1

Nucl.Phys.A827:350c-352c,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures; to appear in the proceedings of 18th Particles and Nuclei International Conference (PANIC08), Eilat, Israe

Scientific paper

10.1016/j.nuclphysa.2009.05.076

We present a systematic study of the vector--axial-vector mixing (V-A mixing) in the current correlation functions and its evolution with temperature within an effective field theory. The $a_1$-$\rho$-$\pi$ coupling vanishes at the critical temperature $T_c$ and thus the V-A mixing also vanishes. A remarkable observation is that even for finite $m_\pi$ the $\rho$ and $a_1$ meson masses are almost degenerate at $T_c$. The vanishing V-A mixing at $T_c$ stays approximately intact.

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