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  • Alkhazov, G.; Alves, A. A.; d’Argent, P.; Romeu, J. Arnau; Artuso, M.; Auriemma, G.; Baalouch, M.; Babuschkin, I.; Battista, V.; Belyaev, I.; Bifani, S.; Buytaert, J.; Calvi, M.; Garcia, L. Castillo; Cogneras, E.; Cojocariu, L.; Coombs, G.; Couturier, B.; Crocombe, A.; Currie, R.; Dendek, A.; Derkach, D.; Dovbnya, A.; Easo, S.; Eisenhardt, S.; Eitschberger, U.; Ekelhof, R.; Fay, R.; Ferrari, F.; Fitzpatrick, C.; Forty, R.; Gambetta, S.; Martin, L. M. Garcia; Garsed, P. J.; Gianì, S.; Giubega, L.; Graverini, E.; Göbel, C.; Haefeli, G.; Henrard, P.; Henry, L.; Hulsbergen, W.; Jacobsson, R.; Jiang, F.; Kandybei, S.; Ketel, T.; Leflat, A.; Lindner, R.; Luo, H.; Lusiani, A.; Maguire, K.; Marchand, J. F.; Marinangeli, M.; Morgunova, O.; Nandi, A.; Nieswand, S.; Oblakowska-Mucha, A.; Obraztsov, V.; Goicochea, J. M. Otalora; Papanestis, A.; Parker, W.; Pastore, A.; Pikies, M.; Pistone, A.; Piucci, A.; Popovici, B.; Prouve, C.; Rangel, M. S.; Raven, G.; Reichert, S.; Renaudin, V.; Richards, S.; Robbe, P.; Ronayne, J. W.; Saitta, B.; Sedes, B. Sanmartin; Schiller, M.; Schubert, K.; Schune, M.-H.; Sergi, A.; Siddi, B. G.; Simi, G.; Skwarnicki, T.; Smith, M.; Stoica, S.; Sun, L.; Szumlak, T.; Tekampe, T.; Tran, M. T.; Tully, A.; van Veghel, M.; Diaz, M. Vieites; Walsh, J.; Wislicki, W.; Wraight, K.; Zarebski, K. A.; Zhang, L.; Zhelezov, A.; Zhu, X.; Zhukov, V.

    The journal of high energy physics, 9/6, Letnik: 2017, Številka: 6
    Journal Article

    A bstract The production cross-section of J/ψ pairs is measured using a data sample of pp collisions collected by the LHCb experiment at a centre-of-mass energy of s = 13 TeV, corresponding to an integrated luminosity of 279 ±11 pb −1 . The measurement is performed for J/ψ mesons with a transverse momentum of less than 10 GeV/ c in the rapidity range 2 . 0 < y < 4 . 5. The production cross-section is measured to be 15 . 2 ± 1 . 0 ± 0 . 9 nb. The first uncertainty is statistical, and the second is systematic. The differential cross-sections as functions of several kinematic variables of the J/ψ pair are measured and compared to theoretical predictions.