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Physical Review Letters 108 (2012) 092301
Particle-yield modification in jet-like azimuthal di-hadron correlations in Pb-Pb collisions at $\sqrt(s_NN)$ = 2.76 TeV
K. Aamodt, L. Aphecetche1, N. Arbor2, A. Baldisseri3, A. Baldit4, V. Barret4, N. Bastid4, Guillaume Batigne1, I. Belikov5, H. Borel3, B. Boyer6, M. Bregant1, J. Castillo Castellanos3, J.L. Charvet3, C. Cheshkov7, B. Cheynis7, J.-P. Coffin5, G. Conesa Balbastre2, Z. Conesa Del Valle5, P. Crochet4, H. Delagrange1, O. Driga1, L. Ducroux7, P. Dupieux4, B. Espagnon6, M. Estienne1, J. Faivre2, C. Furget2, M. Germain1, C. Geuna3, J.-Y. Grossiord7, R. Guernane2, M. Guilbaud7, C. Hadjidakis6, B. Hippolyte5, I. Hrivnacova6, R. Ichou4, S. Jangal5, S. Kox2, C. Kuhn5, A. Lardeux1, Y. Le Bornec6, F. Lefevre1, M. Lenhardt1, X. Lopez4, L. Luquin1, A. Maire5, F. Manso4, Y. Mao2, G. Martınez Garcıa1, A. Mas1, L. Massacrier7, A. Michalon5, S. Pal3, P. Pillot1, S. Porteboeuf-Houssais, A. Rakotozafindrabe3, J.S. Real2, P. Rosnet4, C. Roy5, Y. Schutz1, C. Suire6, J.D. Tapia Takaki6, R. Tieulent7, A. Uras7, L. Valencia Palomo6, R. Vernet8, B. Vulpescu4, R. Wan5, H. Yang3, Y. Zoccarato7
For the ALICE collaboration(s)
(2012)

The yield of charged particles associated with high-pT trigger particles (8 < pT < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jet-like correlation peaks in azimuthal di-hadron correlations. In the 5% most central collisions, we observe that the yield of associated charged particles with transverse momenta pT > 3 GeV/c on the away-side drops to about 60% of that observed in pp collisions, while on the near-side a moderate enhancement of 20-30% is found.
1:  SUBATECH - Laboratoire SUBATECH Nantes
2:  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3:  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
4:  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
5:  IPHC - Institut Pluridisciplinaire Hubert Curien
6:  IPNO - Institut de Physique Nucléaire d'Orsay
7:  IPNL - Institut de Physique Nucléaire de Lyon
8:  CC IN2P3 - Centre de Calcul de l'inst. national de phy. nucléaire et de phy. des particules
Alice
Physics/High Energy Physics - Experiment

Physics/Nuclear Experiment
Fulltext link: 
http://fr.arXiv.org/abs/1110.0121