Nuclear bound state of eta'(958) and partial restoration of chiral symmetry in the eta' mass

Jido, Daisuke; Nagahiro, Hideko; Hirenzaki, Satoru

doi:10.1103/PhysRevC.85.032201

Nuclear bound state of eta'(958) and partial restoration of chiral symmetry in the eta' mass

Sep, 2011

4 pages

Published in:

Phys.Rev.C 85 (2012) 032201

e-Print:

1109.0394 [nucl-th]

DOI:

10.1103/PhysRevC.85.032201

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Abstract: (arXiv)

The in-medium mass of the

\eta^{\prime}

meson is discussed in a context of partial restoration of chiral symmetry in nuclear medium. The

\eta^{\prime}

mass is expected to be reduced by order of 100 MeV at the saturation density. The reduction is a consequence of the suppression of the anomaly effect on the

\eta^{\prime}

mass induced by partial restoration of chiral symmetry. This strong attraction in

\eta^{\prime}

nuclear systems does not accompany large absorption of

\eta^{\prime}

into nuclear matter. This leads to the possibility of so narrow bound states of the

\eta^{\prime}

meson in nuclei to be seen in hadronic reactions with light nuclear targets.

Note:

5 pages, 2 figures, accepted version

25.80.Hp
14.40.Be
21.85.+d
symmetry: chiral
eta(958): mass
flavor: SU(3)
nuclear matter
SU(3) x SU(3)
eta(958): bound state
anomaly: U(1)

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