Centrality dependence of Pi- Production and Stopping in p-A Collisions at 18 GeV/c

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dc.creatorChemakin, I.
dc.creatorCianciolo, V.
dc.creatorCole, B. A.
dc.creatorFernow, R.
dc.creatorFrawley, A.
dc.creatorGilkes, M.
dc.creatorGushue, S.
dc.creatorHartouni, E. P.
dc.creatorHiejima, H.
dc.creatorJustice, M.
dc.creatorKang, J. H.
dc.creatorKirk, H.
dc.creatorMaeda, N.
dc.creatorMioduszewski, S.
dc.creatorMorrison, D.
dc.creatorMoulson, M.
dc.creatorNamboodiri, M. N.
dc.creatorRai, G.
dc.creatorRead, K.
dc.creatorRemsberg, L.
dc.creatorRosati, M.
dc.creatorShin, Y.
dc.creatorSoltz, R. A.
dc.creatorSorensen, S.
dc.creatorThomas, J.
dc.creatorTorun, Y.
dc.creatorWinter, D.
dc.creatorYang, X.
dc.creatorZajc, W. A.
dc.creatorZhang, Y.
dc.date1999-02-19
dc.date.accessioned2026-07-07T05:37:47Z
dc.date.available2026-07-07T05:37:47Z
dc.descriptionFirst results are presented from BNL experiment E910 on pion production and stopping in proton-Be, Cu, and Au collisions at a beam momentum of 18 GeV/c. We characterize the centrality of the collisions using the measured number of "grey" tracks, Ngrey,and a derived quantity, nu, the number of inelastic nucleon-nucleon scatterings suffered by the projectile during the collision. We find that for the three targets the average backward rapidity shift of the leading proton follows a common trend versus nu with the projectile losing, on average, 2 units of rapidity in the first 2-3 scatterings. The average rapidity shift increases more slowly with subsequent scatterings reaching a maximum of 2.5 units. The pi- multiplicity measured within the E910 acceptance saturates with increasing nu in p-Au collisions while the pi- multiplicity in p-Be collisions increases faster with nu than expected from the wounded-nucleon model. Comparisons of our data with the RQMD cascade model suggest that in very central p-Au collisions most of the pions are produced near zero rapidity in the lab.
dc.description5 pages, 13 figures, submitted for publication to Phys. Rev. Lett., Formatted with RevTex
dc.identifierhttps://arxiv.org/abs/nucl-ex/9902009
dc.identifierhttp://arxiv.org/abs/nucl-ex/9902009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81400
dc.subjectNuclear Experiment
dc.titleCentrality dependence of Pi- Production and Stopping in p-A Collisions at 18 GeV/c
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