Test of phi renormalization in nuclei through phi photoproduction

Details Test of phi renormalization in nuclei through phi photoproduction Test of phi renormalization in nuclei through phi photoproduction

2000-11-06

arxiv.org/abs/nucl-th/0011019v2

Phys.Lett. B508 (2001) 237-242

Physics

Nuclear Physics

Nuclear Theory

10 pages, 3 figures

Scientific paper

10.1016/S0370-2693(01)00542-1

We propose an experimental procedure to find out the medium modifications of the $\phi$ meson. The reaction is inclusive $\phi$ photoproduction in nuclei, looking for $K^+ K^-$ pairs from the $\phi$ decay with total momentum smaller than 100-150 $MeV/c$, which are made possible at energies of present laboratories from center of mass $\phi$ backward production and the help of Fermi motion. We have conducted a many body calculation of the mass distribution of the $\phi$ adapted to the experimental set up of a recent JLAB experiment where the backwards $\phi$ photoproduction has been measured. Using recent results for the in medium properties of the $\phi$, we find that the width of the invariant mass distribution for photoproduction on medium to heavy nuclei is larger than the free $\phi$ width by a factor of two or more.

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