Study of coherent J/psi production in lead-lead collisions at root s(NN)=5 TeV with the LHCb experiment

Bursche, A; Bediaga, I; Cruz Torres, M; De Miranda, Jm; dos Reis, Ac; Gomes, A; Massafferri, A; Molina Rodriguez, J; Soares Lavra, L; Tourinho Jadallah Aoude, R; Amato, S; Carvalho Akiba, K; Da Cunha Marinho, F; De Paula, L; Ferreira Rodrigues, E; Gandelman, M; Hicheur, A; Lopes, Jh; Nasteva, I; Otalora Goicochea, Jm; Polycarpo, E; Potterat, C; Rangel, Ms; Silva de Oliveira, L; Souza De Paula, B; An, L; Chen, C; Davis, A; Gan, Y; Gao, Y; Gu, C; Jiang, F; Li, T; Liu, X; Ren, Z; Sun, J; Tang, Z; Wang, M; Xu, A; Xu, Z; Yang, Z; Zhang, L; Zhang, Wc; Zhu, X; Chefdeville, M; Decamp, D; Ghez, P; Marchand, Jf; Minard, M; Pietrzyk, B; Reboud, M; T'Jampens, S; Tournefier, E; Ajaltouni, Z; Cogneras, E; Deschamps, O; Gazzoni, G; Hadjivasiliou, C; Kozeiha, M; Lefevre, R; Maratas, J; Monteil, S; Perret, P; Quintana, B; Tisserand, V; Vernet, M; Romeu, Ja; Aslanides, E; Cogan, J; Gerstel, D; Le Gac, R; Leroy, O; Mancinelli, G; Martin, M; Meaux, C; Morris, Ab; Serrano, J; Tayduganov, A; Tsaregorodtsev, A; 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doi:10.1016/j.nuclphysa.2018.10.069

Coherent production of J/psi mesons is studied in lead-lead collision data at a nucleon-nucleon centre-of-mass energy of 5 TeV collected by the LHCb experiment. The data set corresponds to an integrated luminosity of about 10 mu b(-1). The J/psi, mesons are reconstructed in the dimuon final state, where the muons are detected within the pseudorapidity region 2.0 < eta < 4.5. The J/psi mesons are required to have transverse momentum P-T < 1 GeV and rapidity 2.0 < y < 4.5. The cross-section within this fiducial region is measured to be sigma = 5.3 +/- 0.2 (stat) +/- 0.5 (syst) +/- 0.7 (lumi) mb. The differential cross-section is also measured in five bins of J/psi rapidity. The results are compared to predictions from phenomenological models.

Bursche, A., Bediaga, I., Cruz Torres, M., De Miranda, J.m., dos Reis, A.c., Gomes, A., et al. (2019). Study of coherent J/psi production in lead-lead collisions at root s(NN)=5 TeV with the LHCb experiment. NUCLEAR PHYSICS. A, 982, 247-250 [10.1016/j.nuclphysa.2018.10.069].