A renewed look at eta' in medium
classification
⚛️ nucl-th
hep-lathep-ph
keywords
mediumsymmetrywhetherchangechiraldenseeffectivelyfinite
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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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