Production of muons from heavy flavour decays at forward rapidity in pp and Pb-Pb collisions at $\sqrt {s_{NN}}$ = 2.76 TeV

B. Abelev , Laurent Aphecetche (1) , A. Baldisseri (2) , Guillaume Batigne (1) , I. Belikov (3) , A.A.E. Bergognon (1) , H. Borel (2) , M. Bregant (1) , J. Castillo Castellanos (2) , J.L. Charvet (2) , C. Cheshkov (4) , B. Cheynis (4) , H. Delagrange (1) , O. Driga (1) , L. Ducroux (4) , Magali Estienne (1) , Marie Germain (1) , J.-Y. Grossiord (5) , Maxime Guilbaud (4) , B. Hippolyte (3) , S. Jangal (3) , C. Kuhn (3) , A. Lardeux (1) , F. Lef'Evre (1) , M. Lenhardt (1) , L. Luquin (1) , Gines Martinez Garcia (1) , A. Mas (1) , L. Massacrier (1, 4) , A. Matyja (1) , S. Pal (2) , H. Pereira da Costa (2) , Philippe Pillot (1) , A. Rakotozafindrabe (2) , C. Roy (3) , X. Sanchez Castro (3) , Y. Schutz (1) , Alexandre Shabetai (1) , Diego Stocco (1) , R. Tieulent (4) , A. Uras (4) , R. Vernet (6) , R. Wan (3) , H. Yang (2) , Y. Zoccarato (4) , N. Arbor (7) , G. Conesa Balbastre (7) , J. Faivre (7) , C. Furget (7) , R. Guernane (7) , S. Kox (7) , J.S. Real (7) , C. Silvestre (7) , Sang Un Ahn (8) , Y.W. Baek (8) , A. Baldit (8) , V. Barret (8) , N. Bastid (8) , P. Crochet (8) , P. Dupieux (8) , R. Ichou (8) , X. Lopez (8) , F. Manso (8) , M. Marchisone (8) , S. Porteboeuf-Houssais (8) , P. Rosnet (8) , B. Vulpescu (8) , X. Zhang (8)

1 SUBATECH - Laboratoire SUBATECH Nantes
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
3 DRS-IPHC - Département Recherches Subatomiques
4 IPNL - Institut de Physique Nucléaire de Lyon
5 ALICE
6 CC-IN2P3 - Centre de Calcul de l'IN2P3
7 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
8 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

The ALICE Collaboration has measured the inclusive production of muons from heavy flavour decays at forward rapidity, 2.5 < y < 4, in pp and Pb-Pb collisions at $\sqrt {s_{NN}}$ = 2.76 TeV. The pt-differential inclusive cross section of muons from heavy flavour decays in pp collisions is compared to perturbative QCD calculations. The nuclear modification factor is studied as a function of pt and collision centrality. A weak suppression is measured in peripheral collisions. In the most central collisions, a suppression of a factor of about 3-4 is observed in 6 < pt < 10 GeV/c. The suppression shows no significant pt dependence.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique Nucléaire Expérimentale [nucl-ex]

B. Abelev, Laurent Aphecetche, A. Baldisseri, Guillaume Batigne, I. Belikov, et al.. Production of muons from heavy flavour decays at forward rapidity in pp and Pb-Pb collisions at $\sqrt {s_{NN}}$ = 2.76 TeV. Physical Review Letters, 2012, 109, pp.112301. ⟨10.1103/PhysRevLett.109.112301⟩. ⟨in2p3-00702327⟩