Finite-temperature effect on broken UA(1) symmetry and the η′ mass |
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| Authors: | H. Kikuchi and T. Akiba |
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| Affiliation: | Department of Physics, Tohoku University, Sendai 980, Japan |
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| Abstract: | The UA(1) symmetry-breaking effective lagrangian mediated by the instanton is calculated in the semiclassical approximation at finite temperature. It is found that the strength of the effective vertex decreases with increasing temperature up to the QCD scale. Also, we discuss the possible variation of the η′ and other pseudoscalar meson masses. |
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