Abstract
Data on high-pT hadron production in heavy ion collisions at Feynman xF=0 indicate at universality of the observed nuclear suppression. Our analysis of the production mechanisms demonstrates important role of the color transparency effects which make the survival probability of a quark-antiquark dipole independent of the quark flavor, provided that the hadron wave function is formed outside the medium. The latter condition imposes restrictions on the range of pT, which should be sufficiently high to make the nuclear suppression universal. We also found that the in-medium broadening rate q^ (frequently called transport coefficient) significantly depends on the quark flavor, diminishing for heavy quarks. Published by the American Physical Society 2024
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