Backward proton production in π+ and K+ collisions with Al and Au nuclei at 250 GeV/c

N. M. Agababyan*, I. V. Ajinenko, M. R. Atayan, K. Belous, M. Charlet, P. V. Chliapnikov, E. A. De Wolf, K. Dziunikowska, A. M F Endler, Z. Sh Garutchava, H. R. Gulkanyan, R. Sh Hakobyan, J. K. Karamyan, D. Kisielewska, W. Kittel, S. S. Mehrabyan, Z. V. Metreveli, L. C S Oliveira, K. Olkiewicz, F. K. RizatdinovaE. K. Shabalina, L. N. Smirnova, M. D. Tabidze, L. A. Tikhonova, A. G. Tomaradze, F. Verbeure, S. A. Zotkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Backward proton production is studied in interactions of π+ and K+ mesons with Al and Au nuclei at 250 GeV/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, {Mathematical expression} and {Mathematical expression}. It is found that the share of the secondary pion absorption can be fitted by a power dependence αAβ, with β=0.27±0.05. An upper limit of the cross section for the colour-charge-exchange mechanism of backward proton production is estimated.

Original languageEnglish (US)
Pages (from-to)385-391
Number of pages7
JournalZeitschrift für Physik C Particles and Fields
Issue number3
StatePublished - Sep 1995

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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