Formation of eta-prime(958) - mesic nuclei and axial U(A)(1) anomaly at finite density

Nagahiro, Hideko; Hirenzaki, Satoru

doi:10.1103/PhysRevLett.94.232503

Formation of eta-prime(958) - mesic nuclei and axial U(A)(1) anomaly at finite density

Hideko Nagahiro
(
- Nara Women's U.
)
,
Satoru Hirenzaki
(
- Nara Women's U.
)

Dec, 2004

4 pages

Published in:

Phys.Rev.Lett. 94 (2005) 232503

e-Print:

hep-ph/0412072 [hep-ph]

DOI:

10.1103/PhysRevLett.94.232503

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Abstract:

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.

25.20.-x
14.40.-n
36.10.Gv
photon-nucleus reactions
mesic atoms
eta meson resonances
Green's function methods
meson nucleus: interaction
meson: bound state
eta(958)

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