Large N_c, chiral approach to M_eta' at finite temperature

Details Large N_c, chiral approach to M_eta' at finite temperature Large N_c, chiral approach to M_eta' at finite temperature

2000-03-07

arxiv.org/abs/hep-ph/0003052v2

Phys.Rev. D62 (2000) 056004

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 6 figures. 2 footnotes added, 1 reference changed and 1 typo corrected. To be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.62.056004

We study the temperature dependence of the eta and eta' meson masses within the framework of U(3)_L x U(3)_R chiral perturbation theory, up to next-to-leading order in a simultaneous expansion in momenta, quark masses and number of colours. We find that both masses decrease at low temperatures, but only very slightly. We analyze higher order corrections and argue that large N_c suggests a discontinuous drop of M_eta' at the critical temperature of deconfinement T_c, consistent with a first order transition to a phase with approximate U(1)_A symmetry.

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