Formation of η'(958)-mesic nuclei and axial U_A(1) anomaly at finite density

Details Formation of η'(958)-mesic nuclei and axial U_A(1) anomaly at finite density Formation of η'(958)-mesic nuclei and axial U_A(1) anomaly at finite density

2004-12-06

arxiv.org/abs/hep-ph/0412072v1

Phys.Rev.Lett. 94 (2005) 232503

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.94.232503

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

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