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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. Li
  • H. 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

Research output: Contribution to journalArticlepeer-review

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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