Leading baryon production in p+A collisions at relativistic energies

K. N. Barish, S. Batsouli, S. J. Bennett, M. Bertaina, A. Chikanian, T. M. Cormier, P. Fachini, B. Fadem, L. E. Finch, N. K. George, S. V. Greene, P. Haridas, J. C. Hill, A. S. Hirsch, R. Hoversten, H. Z. Huang, H. Jaradat, T. Lainis, J. G. Lajoie, Q. LiH. Long, C. Maguire, R. D. Majka, T. E. Miller, M. G. Munhoz, J. L. Nagle, A. Petridis, I. A. Pless, N. T. Porile, C. A. Pruneau, M. S.Z. Rabin, J. D. Reid, A. Rose, J. Sandweiss, R. P. Scharenberg, A. J. Slaughter, A. Tai, G. Van Buren, F. K. Wohn, Z. Xu, E. Yamamoto

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5 Scopus citations

Abstract

Invariant multiplicity distributions of the leading neutron and proton have been measured in minimum bias p + Be, p + Al, p + Cu, and p + Pb collisions at 19 GeV/c and p + Be and p + Pb collisions at 12 GeV/c with the E864/E941 spectrometer at the Alternating Gradient Synchrotron (AGS). The experimental acceptance for the measurement covers a rapidity region of 1.7≤y≤3.3 and transverse momentum region of 0.075 GeV/c≤pT≤1.025 GeV/c. The leading proton and leading neutron production, as a function of the light cone momentum fraction x+, show energy scaling at AGS energies. The proton/neutron ratio, (dN/dx+)p/(dN/dx+)n, decreases from about 5.0 near beam rapidity to about one at midrapidity. The ratio has no strong target dependence as a function of rapidity. The target dependence of the leading proton distribution as a function of x+ demonstrates an approximate energy scaling from the AGS to the Super Proton Synchrotron.

Original languageEnglish
Article number014904
Pages (from-to)149041-1490411
Number of pages1341371
JournalPhysical Review C - Nuclear Physics
Volume65
Issue number1
DOIs
StatePublished - 2002
Externally publishedYes

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