Semi-Inclusive Lambda and Kshort Production in p-Au Collisions at 17.5 GeV/c
I. Chemakin, V. Cianciolo, B. A. Cole, R. Fernow, A. D. Frawley, M. Gilkes, S. Gushue, E. P. Hartouni, H. Hiejima, M. Justice, J. H. Kang, H. Kirk, N. Maeda, S. Mioduszewski, D. Morrison, M. Moulson, M. N. Namboodiri, G. Rai, K. Read, L. Remsberg, M. Rosati, Y. Shin, R. A. Soltz, S. Sorensen, J. H. Thomas, Y. Torun, D. Winter, X. Yang, W. A. Zajc, Y. Zhang
Abstract
The first detailed measurements of the centrality dependence of strangeness production in p-A collisions are presented. Lambda and Kshort dn/dy distributions from 17.5 GeV/c p-Au collisions are shown as a function of "grey" track multiplicity and the estimated number of collisions, nu, made by the proton. The nu dependence of the Lambda yield deviates from a scaling of p-p data by the number of participants, increasing faster than this scaling for nu<=5 and saturating for larger nu. A slower growth in Kshort multiplicity with nu is observed, consistent with a weaker nu dependence of K-Kbar production than Y-K production.
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