Centrality dependence of charged antiparticle to particle ratios near mid-rapidity in d+Au collisions at sqrt(sNN)=200 GeV
B. B. Back
Abstract
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(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<ypi<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 centrality dependence is observed in all three ratios. The data are compared to results from other systems and model calculations.
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