Centrality dependence of charged-hadron transverse-momentum spectra in d + Au collisions at √sNN = 200 GeV

We have measured transverse momentum distributions of charged hadrons produced in d + Au collisions at s N N = 200 GeV. The spectra were obtained for transverse momenta 0.25 < p T < 6.0 GeV/c, in a pseudorapidity range of0.2 < η < 1.4 in the deuteron direction. The evolution of the spectra with collision centrality is presented in comparison to p + p collisions at the same collision energy. With increasing centrality, the yield at high transverse momenta increases more rapidly than the overall particle density, leading to a strong modification of the spectral shape. This change in spectral shape is qualitatively different from observations in Au + Au collisions at the same energy. The results provide important information for discriminating between different models for the suppression of high-p T hadrons observed in Au + Au collisions.