Measurements of the heavy-flavour nuclear modification factor in p–Pb collisions at with ALICE at the LHC

Li, S. and Abelev, B. and Adam, J. and Adamová, D. and Aggarwal, M. M. and Aglieri, Rinella G. and Agnello, M. and Agostinelli, A. and Agrawal, N. and Ahammed, Z. and Ahmad, N. and Ahmed, I. and Ahn, S. U. and Ahn, S. A. and Aimo, I. and Aiola, S. and Ajaz, M. and Akindinov, A. and Alam, S. N. and Aleksandrov, D. and Alessandro, B. and Alexandre, D. and Alici, A. and Alkin, A. and Alme, J. and Alt, T. and Altinpinar, S. and Altsybeev, I. and Alves, Garcia Prado C. and Andrei, C. and Barnaföldi, Gergely Gábor and Bencédi, Gyula and Berényi, Dániel and Boldizsár, László and Dénes, Ervin and Hamar, Gergő and Kiss, Gábor and Varga-Kőfaragó, Mónika and Lévai, Péter and Oláh, László and Pochybova, Sona (2014) Measurements of the heavy-flavour nuclear modification factor in p–Pb collisions at with ALICE at the LHC. NUCLEAR PHYSICS A, 931. pp. 546-551. ISSN 0375-9474

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Abstract

The heavy-flavour nuclear modification factor RpPb has been measured with the ALICE detector in p–Pb collisions at the nucleon– nucleon center of mass energy √sNN = 5.02 TeV at the CERN LHC in a wide rapidity and transverse momentum range, as well as in several decay channels. RpPb 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.

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