Abstract
We shed light upon the η' mass in nuclear matter in the context of partial restoration of chiral symmetry, pointing out that the UA(1) anomaly effects causes the η'-η mass difference necessarily through the chiral symmetry breaking. As a consequence, it is expected that the η' mass is reduced by order of 100 MeV in nuclear matter where partial restoration of chiral symmetry takes place. The discussion given here is based on Ref. [1]
Highlights
Substantial description of hadron properties in terms of quark-gluon language brings us deeper insight of hadron and its systematic understanding
It is expected that the η′ mass is reduced by order of 100 MeV in nuclear matter where partial restoration of chiral symmetry takes place
It is important noting that the UA(1) anomaly can affect on the η′ mass only through the dynamical and/or explicit breaking of the SU(3) chiral symmetry [3, 1]
Summary
Substantial description of hadron properties in terms of quark-gluon language brings us deeper insight of hadron and its systematic understanding. It is important noting that the UA(1) anomaly can affect on the η′ mass only through the dynamical and/or explicit breaking of the SU(3) chiral symmetry [3, 1]. Since the partial restoration of chiral symmetry takes place in nuclear matter, one expects a strong mass reduction of the η′ meson there [1]. Such a strong mass reduction in nuclear matter corresponds to a strong attractive force between the η′ meson and a finite nucleus.
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