A renewed look at eta' in medium
Youngshin Kwon, Su Houng Lee, Kenji Morita, Gyuri Wolf
TL;DR
This paper investigates whether the eta'-meson mass changes in hot and dense media due to potential U_A(1) symmetry restoration, by extending the Witten-Veneziano formula to finite temperature.
Contribution
It generalizes the Witten-Veneziano formula to finite temperature to study eta'-meson mass behavior in medium.
Findings
Potential mass reduction of eta'-meson in hot/dense medium.
Insights into U_A(1) symmetry restoration at finite temperature.
Implications for chiral symmetry restoration in QCD.
Abstract
We revisit the question of whether the U_A(1) symmetry is effectively restored in hot and dense medium. In particular, by generalizing the Witten-Veneziano formula to finite temperature, we investigate whether the mass of eta'-meson will change in medium due to the restoration of chiral symmetry.
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