This article is cited in 6 papers

FIELDS, PARTICLES, AND NUCLEI

Investigation of the subthreshold production of $K^-$ mesons in proton-nucleus collisions

A. V. Akindinov^a, Yu. T. Kiselev^a, A. N. Martem'yanov^a, K. R. Mikhailov^a, È. Ya. Par'ev^b, V. A. Smirnitsky^a, Yu. V. Terekhov^a, M. M. Chumakov^a, V. A. Sheinkman<sup>a

a</sup> Institute for Theoretical and Experimental Physics (Russian Federation State Scientific Center)
^b Institute for Nuclear Research, Russian Academy of Sciences

Abstract: The differential cross sections for the proton-induced production of K ⁻ mesons on Be, Al, and Cu nuclei in the subthreshold energy region have been measured. Folding-model calculation including three channels of their production satisfactorily reproduces the experimental data. It has been shown that the main contribution to the production of hard K ⁻ mesons comes from the nonresonant direct process. Evidence for the existence of an attractive optical potential with a magnitude of about 140 MeV for K ⁻ at normal nuclear density has been obtained.

PACS: 21.30.+y, 25.40.-h

Received: 25.12.2006

 English version: Journal of Experimental and Theoretical Physics Letters, 2007, 85:3, 142–148

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