The $φ$ meson width in the medium from proton induced $φ$ production in nuclei

Details The $φ$ meson width in the medium from proton induced $φ$ production in nuclei The $φ$ meson width in the medium from proton induced $φ$ production in nuclei

2004-03-22

arxiv.org/abs/nucl-th/0403067v2

Phys.Rev. C71 (2005) 065202

Physics

Nuclear Physics

Nuclear Theory

26 pages, 13 figures. More detailed calculations have been performed. Paper is accepted for publication in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.71.065202

We perform calculations for the production of $\phi$ mesons in nuclei at energies just above threshold and study the $A$ dependence of the cross section. We use results for the $\phi$ selfenergy in the medium obtained within a chiral unitary approach. We find a strong $A$ dependence which is tied to the distortion of the incident proton and to the absorption of the $\phi$ in its way out of the nucleus. The effect of this latter process reduces the cross section in about a factor two in heavy nuclei proving that the $A$ dependence of the cross section bears valuable information on the $\phi$ width in the nuclear medium. Calculations are done for energies which are accessible in an experimental facility like COSY.

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