Formation of η(958)-Mesic Nuclei and Axial UA(1) Anomaly at Finite Density

Hideko Nagahiro and Satoru Hirenzaki
Phys. Rev. Lett. 94, 232503 – Published 15 June 2005

Abstract

We discuss the possibility of producing the bound states of the η(958) meson in nuclei theoretically. We calculate the formation cross sections of the η bound states with the Green function method for the (γ,p) reaction and discuss the experimental feasibility at photon facilities such as SPring-8. We conclude that we can expect to observe resonance peaks in (γ,p) spectra for the formation of η bound states and we can deduce new information on η properties at finite density. These observations are believed to be essential to know the possible mass shift of η and deduce new information on the effective restoration of the chiral UA(1) anomaly in the nuclear medium.

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  • Received 3 December 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.232503

©2005 American Physical Society

Authors & Affiliations

Hideko Nagahiro1 and Satoru Hirenzaki2

  • 1Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
  • 2Department of Physics, Nara Women’s University, Nara 630-8506, Japan

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Issue

Vol. 94, Iss. 23 — 17 June 2005

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