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Title
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Backward proton production in and collisions with Al and Au nuclei at 250 GeV/c
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Author
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Abstract
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| Backward proton production is studied in interactions of pi(+) and K+ mesons with Al and Au nuclei at 250 CeV/c, The proton momentum spectra are measured at different emission angles. From the two-proton correlations, it is found, that a significant part ((26+/-4)% for Al and (44+/-6)% for Au) of the backward proton production can be attributed to secondary pion absorption by a nucleon pair in the nuclear medium, pi(+)(pn) --> (p) over left arrow p and pi(0)(pp) --> (p) over left arrow p. It is found that the share of the secondary pion absorption can be fitted by a power dependence proportional to A(beta), with beta = 0.27+/-0.05. An upper limit of the cross section for the colour-charge-exchange mechanism of backward proton production is estimated. |
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Language
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English
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Source (journal)
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Zeitschrift für Physik : C : particles and fields. - Berlin
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Publication
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Berlin
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1995
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ISSN
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0170-9739
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Volume/pages
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66
:3
(1995)
, p. 385-392
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ISI
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A1995QV77200007
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