Centrality dependence of charged antiparticle to particle ratios near midrapidity in d+Au collisions at √SNN=200 GeV

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. Harrington, C. HendersonD. 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, R. Nouicer, 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 ratios of the yields of charged antiparticles to particles have been obtained for pions, kaons, and protons near midrapidity for d+Au collisions at √SNN=200 GeV as a function of centrality. The reported values represent the ratio of the yields averaged over the rapidity range of 0.1 <yπ< 1.3 and 0<yK,p<0.8, where positive rapidity is in the deuteron direction, and for transverse momenta 0.1<p Tπ,K<1 GeV/c and 0.3<pT p<1 GeV/c. Within the uncertainties, a lack of centrality dependence is observed in all three ratios. The data are compared to results from other systems and model calculations.

Original languageEnglish
Article number011901
Pages (from-to)011901-1-011901-5
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number1
DOIs
StatePublished - Jul 2004

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