Parametrization of the antiproton inclusive production cross section on nuclei

Abstract

A new parametrization of the $\overline{p}$ inclusive production cross section in proton-proton and proton-nucleus collisions is proposed. A sample of consistent $p\stackrel{\ensuremath{\rightarrow}}{A}\overline{p}X$ experimental data sets measured on $1<~A<~208$ nuclei, from 12 GeV up to 400 GeV incident energy, has been used to constrain the parameters. A broader energy domain is covered for the $p\stackrel{\ensuremath{\rightarrow}}{p}\overline{p}X$ reaction and with a simplified functional form used in the fits. The agreement obtained with the data is good. The results are discussed.