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

B. Back, M. Baker, M. Ballintijn, D. Barton, B. Becker, R. Betts, A. Bickley, R. Bindel, W. Busza, A. Carroll, M. Decowski, E. García (+49 others)
2004 Physical Review C  
The ratios of the yields of charged antiparticles to particles have been obtained for pions, kaons, and protons near mid-rapidity for d+Au collisions at sqrt(s_NN) = 200 GeV as a function of centrality. The reported values represent the ratio of the yields averaged over the rapidity range of 0.1<y_pi<1.3 and 0<y_(K,p)<0.8, where positive rapidity is in the deuteron direction, and for transverse momenta 0.1<p_(T)^(pi,K)<1.0 GeV/c and 0.3<p_(T)^(p)<1.0 GeV/c. Within the uncertainties, a lack of
more » ... inties, a lack of centrality dependence is observed in all three ratios. The data are compared to results from other systems and model calculations.
doi:10.1103/physrevc.70.011901 fatcat:ede2nyffvndjxj35l6gmvifaey