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

V. K. Magas·L. Roca·E. Oset
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Abstract

We perform calculations for the production of $ϕ$ mesons in nuclei at energies just above threshold and study the $A$ dependence of the cross section. We use results for the $ϕ$ 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 $ϕ$ 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 $ϕ$ width in the nuclear medium. Calculations are done for energies which are accessible in an experimental facility like COSY.

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V. K. Magas, L. Roca, E. Oset. 2005-04-15. The $ϕ$ meson width in the medium from proton induced $ϕ$ production in nuclei. https://doi.org/10.1103/physrevc.71.065202

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