Measurements of the heavy-flavour nuclear modification factor in p-Pb collisions at root(NN)-N-S=5.02 TeV with ALICE at the LHC

摘要

The heavy-flavour nuclear modification factor R-pPb has been measured with the ALICE detector in p-Pb collisions at the nucleon-nucleon center of mass energy root sN N = 5.02 TeV at the CERN LHC in a wide rapidity and transverse momentum range, as well as in several decay channels. R-pPb is consistent with unity within uncertainties at mid-rapidity and forward rapidity. In the backward region a slight enhancement of the yield of heavy-flavour decay muons is found in the region 2 < PT <4 GeV/c. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurements add experimental evidence that the suppression of heavy-flavour production observed at high PT in central Pb-Pb collisions with respect to pp collisions is due to a medium effect induced by the interaction of heavy quarks with the partonic matter. (C) 2014 CERN. Published by Elsevier B.V. All rights reserved.