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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 M. 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 9 A. Baldit 9 V. Barret 9 N. Bastid 9 P. Crochet 9 P. Dupieux 9 R. Ichou 9 X. Lopez 9 F. Manso 9 M. Marchisone 9 S. Porteboeuf-Houssais 9 P. Rosnet 9 B. Vulpescu 9 X. Zhang 9
Abstract : 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.
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Submitted on : Wednesday, May 30, 2012 - 7:39:50 AM
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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, American Physical Society, 2012, 109, pp.112301. ⟨10.1103/PhysRevLett.109.112301⟩. ⟨in2p3-00702327⟩

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