Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at sNN=5 TeV

• Published in: The journal of high energy physics Vol. 2016; no. 3
• Main Authors: Ali, S., Andreassi, G., Andreotti, M., Badalov, A., Barschel, C., Barsuk, S., Battista, V., Bellee, V., Ben-Haim, E., Bernet, R., Betti, F., Blouw, J., Borsato, M., Brook, N. H., Charles, M., Chrzaszcz, M., Cid Vidal, X., Cliff, H. V., Closier, J., Cook, A., Coombes, M., Craik, D. C., Cruz Torres, M., Dean, C.-T., Dorigo, M., Dziurda, A., Easo, S., Egede, U., El Rifai, I., Ferguson, D., Ferreira Rodrigues, F., Fu, J., Galli, D., Gambetta, S., Ghez, Ph, Graugés, E., Gui, B., Haefeli, G., Harnew, N., Hutchcroft, D., Koopman, R. F., Koppenburg, P., Kuonen, A. K., Langenbruch, C., Lazzeroni, C., Lefèvre, R., Liles, M., Lionetto, F., Liu, B., Luo, H., Lusiani, A., Mapelli, A., Martin, M., Mathad, A., Mathe, Z., Meadows, B., Monteil, S., Morawski, P., Morello, M. J., Needham, M., Neufeld, N., Otalora Goicochea, J. M., Pappenheimer, C., Parker, W., Patrignani, C., Pellegrino, A., Perazzini, S., Playfer, S., Polyakov, I., Potterat, C., Price, E., Qian, W., Renaudin, V., Rotondo, M., Sagidova, N., Saitta, B., Schmidt, B., Seyfert, P., Shapoval, I., Shekhtman, L., Shevchenko, V., Shires, A., Smith, I. T., Soler, F. J. P., Souza De Paula, B., Straticiuc, M., Tayduganov, A., Thomas, C., van Tilburg, J., Tomassetti, L., Vacca, C., Vazquez Gomez, R., van Veghel, M., Vesterinen, M., Voong, D., Vorobyev, A., de Vries, J. A., Waldi, R., Yushchenko, O., Zucchelli, S.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 18.03.2016; Springer Verlag; Springer Verlag (Germany)
• Subjects: Classical and Quantum Gravitation; Col·lisions d'ions pesats; Elementary Particles; Heavy ion collision; High Energy Physics - Experiment; Particles; Partícules (Matèria); Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Experimental Physics; Relativity Theory; String Theory; Relativistic heavy ion physics; Particle and resonance production; Heavy-ion collision; Quarkonium; Heavy Ion Experiments
• ISSN: 1126-6708; 1029-8479; 1029-8479
• DOI: 10.1007/JHEP03(2016)133

A bstract The production of ψ (2 S ) mesons is studied in dimuon final states using proton-lead ( p Pb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1 . 6 nb −1 . The nucleon-nucleon centre-of-mass energy of the p Pb collisions is s N N = 5 TeV. The measurement is performed using ψ (2 S ) mesons with transverse momentum less than 14 GeV/ c and rapidity y in the ranges 1 . 5 < y < 4 . 0 and −5 . 0 < y < −2 . 5 in the nucleon-nucleon centre-of-mass system. The forward-backward production ratio and the nuclear modification factor are determined for ψ (2 S ) mesons. Using the production cross-section results of ψ (2 S ) and J/ψ mesons from b -hadron decays, the b b ¯ cross-section in p Pb collisions at s N N = 5 TeV is obtained.