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  • Ajaltouni, Z.; Albrecht, J.; Alves, A. A.; Badalov, A.; Bellee, V.; Ben-Haim, E.; Bernet, R.; Bien, A.; Blouw, J.; Brodzicka, J.; Campana, P.; Carniti, P.; Cauet, Ch; Chen, S.; Ciezarek, G.; Coco, V.; Cojocariu, L.; Cook, A.; David, P. N. Y.; Dordei, F.; Dorigo, M.; Dujany, G.; Durante, P.; Eidelman, S.; Eklund, L.; El Rifai, I.; Esen, S.; Evans, H. M.; Falabella, A.; Ferguson, D.; Fontana, M.; Frei, C.; Frosini, M.; Gambetta, S.; García Pardiñas, J.; Garra Tico, J.; Gersabeck, M.; Grecu, A.; Guz, Yu; Haines, S. C.; Head, T.; Hennessy, K.; Hynds, D.; Jing, F.; Johnson, D.; Jost, B.; Jurik, N.; Karbach, T. M.; Kecke, M.; Kenyon, I. R.; Kravchuk, L.; Kucharczyk, M.; Kurek, K.; Lacarrere, D.; Lafferty, G.; Liu, B.; Longstaff, I.; Luo, H.; Machefert, F.; Maciuc, F.; Manca, G.; Marks, J.; Martin, M.; McCann, M.; McNab, A.; Mitzel, D. S.; Müller, V.; Needham, M.; Neufeld, N.; Niess, V.; Niet, R.; Nikitin, N.; Papanestis, A.; Pellegrino, A.; Penso, G.; Perazzini, S.; Petridis, K.; Picatoste Olloqui, E.; Pilař, T.; Polyakov, I.; Popovici, B.; Raven, G.; Roiser, S.; Rotondo, M.; Sail, P.; Schune, M.-H.; Shapoval, I.; Silva Coutinho, R.; Sridharan, S.; Stahl, S.; Stefkova, S.; Stevenson, S.; Szczekowski, M.; Tayduganov, A.; Ustyuzhanin, A.; Whitehead, M.; Xie, Y.; Yu, J.; Yushchenko, O.; Zucchelli, S.

    The journal of high energy physics, 26/10, Letnik: 2015, Številka: 10
    Journal Article

    A bstract The production of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of s = 13 TeV is studied with the LHCb detector. Cross-section measurements are performed as a function of the transverse momentum p T and the rapidity y of the J/ψ meson in the region p T < 14 GeV/ c and 2 . 0 < y < 4 . 5, for both prompt J/ψ mesons and J/ψ mesons from b -hadron decays. The production cross-sections integrated over the kinematic coverage are 15 . 30 ± 0 . 03 ± 0 . 86 μb for prompt J/ψ and 2 . 34 ± 0 . 01 ± 0 . 13 μb for J/ψ from b -hadron decays, assuming zero polarization of the J/ ψ meson. The first uncertainties are statistical and the second systematic. The cross-section reported for J/ψ mesons from b -hadron decays is used to extrapolate to a total b b ¯ cross-section. The ratios of the cross-sections with respect to s = 8 TeV are also determined.