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✦   LIBER   ✦

Reanalysis of antiproton production in proton-nucleus and nucleus-nucleus reactions at subthreshold energies

✍ Scribed by A. Sibirtsev; W. Cassing; G.I. Lykasov; M.V. Rzjanin

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
948 KB
Volume
632
Category
Article
ISSN
0375-9474

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✦ Synopsis

We reanalyse the production of pp pairs in proton-nucleus and nucleus-nucleus collisions employing novel elementary cross sections for baryon-baryon and pion-baryon production channels based on a boson-exchange model. In contrast to previous transport studies performed in the literature the secondary pion induced channel is found to be most important in both p + A and A + A collisions at subthreshold energies. A detailed comparison with the experimental data available indicates that sizeable attractive p potentials in the order of -100 to -150 MeV at normal nuclear matter density are needed to reproduce the size and shape of the experimental spectra. @ 1998 Elsevier Science B.V.

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