212 articles – 1959 references  [version française]
HAL: in2p3-00733121, version 1

Detailed view  Export this paper
Physics Letters B 718 (2013) 1273-1283
Coherent J/Psi photoproduction in ultra-peripheral Pb-Pb collisions at \sqrt{s_NN} = 2.76 TeV
B. Abelev, N. Arbor1, G. Conesa Balbastre1, J. Faivre, C. Furget1, R. Guernane1, S. Kox1, J.S. Real1, C. Silvestre1, R. Vernet2, I. Belikov3, B. Hippolyte3, C. Kuhn3, L. Molnar3, C. Roy3, X. Sanchez Castro3, S. Senyukov3, R. Wan3, L. Aphecetche4, Guillaume Batigne4, E. Bergognon4, M. Bregant4, H. Delagrange4, O. Driga4, B. Erazmus4, M. Estienne4, M. Germain4, A. Lardeux4, G. Martinez Garcia4, A. Mas4, L. Massacrier4, A. Matyja4, P. Pillot4, Y. Schutz4, A. Shabetai4, D. Stocco4, c. Cheshkov5, B. Cheynis5, L. Ducroux5, J.-Y. Grossiord5, M. Guilbaud5, R. Tieulent5, A. Uras5, Y. Zoccarato5, Sang Un Ahn6, Y.W. Baek6, V. Barret6, N. Bastid6, P. Crochet6, P. Dupieux6, R. Ichou6, X. Lopez6, F. Manso6, M. Marchisone6, S. Porteboeuf-Houssais6, P. Rosnet6, B. Vulpescu6, X. Zhang6
For the ALICE collaboration(s)

The ALICE collaboration has made the first measurement at the LHC of J/Psi photoproduction in ultra-peripheral Pb-Pb-collisions at \sqrt{s_NN} = 2.76 TeV. The J/Psi is identified via its dimuon decay in the forward rapidity region with the muon spectrometer for events where the hadronic activity is required to be minimal. The analysis is based on an event sample corresponding to an integrated luminosity of about 55 mub-1. The cross section for coherent J/Psi production in the rapidity interval -3.6 < y < -2.6 is measured to be dsigma/dy = 1.00 +/- 0.18 (stat) +0.24/-0.26 (syst) mb. The result is compared to theoretical models for coherent J/Psi production and found to be in good agreement with models which include nuclear gluon shadowing.
1:  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2:  CC IN2P3 - Centre de Calcul de l'inst. national de phy. nucléaire et de phy. des particules
3:  DRS-IPHC - Département Recherches Subatomiques
4:  SUBATECH - Laboratoire SUBATECH Nantes
5:  IPNL - Institut de Physique Nucléaire de Lyon
6:  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
Laboratoire de Physique Corpusculaire
Physics/High Energy Physics - Experiment

Physics/High Energy Physics - Phenomenology

Physics/Nuclear Experiment
Fulltext link: