Rapidities of produced particles in 200-GeV/c +/p/K+ interactions on Au, Ag, and Mg
We have used the Fermilab 30-in. bubble chamberhybrid spectrometer to study the rapidities of produced particles in the interactions of 200-GeV/c protons and + and K+ mesons with nuclei of gold, silver, and magnesium. The average rapidity decreases linearly with the number of projectile collisions p (up to p=5) with no A dependence and little beam dependence. The ratio R of normalized rapidity distributions for hadron-nucleus to hadron-proton interactions shows a plateau in the central region, and becomes much larger in the target region. However, the increase is significantly less than has been reported in previous experiments. As a function of p, the ratio R rises linearly in the target region, more gently in the central region, and decreases slowly in the projectile region, in all cases with no A dependence. Some discrepancies with a previous experiment are observed in the central region. Long-range rapidity correlations are observed in hadron-nucleus events, but not in hadron-proton events. For the former, it is shown that the correlations exist only for those events with multiple projectile collisions, as expected in the multichain dual parton model. © 1990 The American Physical Society.
Brick, DH; Widgoff, M; Beilliere, P; Lutz, P; Narjoux, JL; Gelfand, N; Alyea, ED; Bloomer, M; Bober, J; Busza, W; Cole, B; Frank, TA; Fuess, TA; Grodzins, L; Hafen, ES; Haridas, P; Huang, D; Huang, HZ; Hulsizer, R; Kistiakowsky, V; Ledoux, RJ; Milstene, C; Noguchi, S; Oh, SH; Pless, IA; Steadman, S; Stoughton, TB; Suchorebrow, V; Tether, S; Trepagnier, PC; Wadsworth, BF; Wu, Y; Yamamoto, RK; Cohn, HO; Calligarich, E; Castoldi, C; Dolfini, R; Introzzi, G; Ratti, S; Badiak, M; Dimarco, R; Jacques, PF; Kalelkar, M; Plano, RJ; Stamer, PE; Brucker, EB; Koller, EL; Alexander, G; Grunhaus, J; Levy, A; Brau, JE; Bugg, WM; Condo, GT; Handler, T; Hargis, HJ; Hart, EL; Rafatian, A; Rogers, AH; Kitagaki, T; Tanaka, S; Yuta, H; Abe, K; Hasegawa, K; Yamaguchi, A; Tamai, K; Hayaschino, Y; Otani, Y; Higuchi, M; Sato, M; Ludlam, T; Steiner, R; Taft, H
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