Pseudorapidity distributions of charged particles in d+Au and p+p collisions at √sNN = 200 GeV

Rachid Nouicer, B. B. Back, M. D. Baker, M. Ballintijn, D. S. Barton, B. Becker, R. R. Betts, A. A. Bickley, R. Bindel, W. Busza, A. Carroll, M. P. Decowski, E. García, T. Gburek, N. George, K. Gulbrandsen, S. Gushue, C. Halliwell, J. Hamblen, A. S. HarringtonC. Henderson, D. J. Hofman, R. S. Hollis, R. Hołyński, B. Holzman, A. Iordanova, E. Johnson, J. L. Kane, N. Khan, P. Kulinich, C. M. Kuo, J. W. Lee, W. T. Lin, S. Manly, A. C. Mignerey, A. Olszewski, R. Pak, I. C. Park, H. Pernegger, C. Reed, C. Roland, G. Roland, J. Sagerer, P. Sarin, I. Sedykh, W. Skulski, C. E. Smith, P. Steinberg, G. S.F. Stephans, A. Sukhanov, M. B. Tonjes, A. Trzupek, C. Vale, G. J. Van Nieuwenhuizen, R. Verdier, G. I. Veres, F. L.H. Wolfs, B. Wosiek, K. Woźniak, B. Wysłouch, J. Zhang

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Abstract

The measured pseudorapidity distributions of primary charged particles are presented for d+Au and p+p collisions at √sNN = 200 GeV over a wide pseudorapidity range of |η| ≤ 5.4. The results for d+Au collisions are presented for minimum-bias events and as a function of collision centrality. The measurements for p+p collisions are shown for minimum-bias events. The ratio of the charged particle multiplicity in d+Au and p+A collisions relative to that for inelastic p+p collisions is found to depend only on 〈N part〉, and it is remarkably independent of collision energy and system mass. The deuteron and gold fragmentation regions in d+Au collisions are in good agreement with proton nucleus data at lower energies.

Original languageEnglish
Pages (from-to)S1133-S1137
JournalJournal of Physics G: Nuclear and Particle Physics
Volume30
Issue number8
DOIs
StatePublished - Aug 2004

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