Anomalous suppression of production at large transverse momentum in Au + Au and d + Au collisions at GeV
Laboratoire de Physique Théorique, Unité Mixte de Recherche UMR n 8627 - CNRS, Université de Paris XI, Bâtiment 210, 91405, Orsay Cedex, France
2 Departamento de Física de Partículas, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
3 Institute of Theoretical and Experimental Physics, 117259, Moscow, Russia
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We propose a model of the suppression of large p T pions in heavy ion collisions based on the interaction of the large p T pion with the dense medium created in the collision. The model is practically the same as the one previously introduced to describe suppression. Both the p T and the centrality dependence of the data are reproduced. In deuteron-gold collisions, the effect of the final state interaction with the dense medium turns out to be negligibly small. Here the main features of the data are also reproduced both at mid and at forward rapidities.
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