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Aaij, R.; Beaucourt, L.; Chefdeville, M.; Decamp, D.; Déléage, N.; Ghez, P.; Marchand, J.-F.; Minard, M.-N.; Pietrzyk, B.; t'Jampens, S.; Tisserand, V.; Tournefier, E.; Arnau Romeu, J.; Aslanides, E.; Cogan, J.; Bruyn, K. De; Legac, R.; Leroy, O.; Mancinelli, G.; Martin, M.; Mordà, A.; Serrano, J.; Tayduganov, A.; Tsaregorodtsev, A.; Ajaltouni, Z.J.; Baalouch, M.; Cogneras, E.; Deschamps, O.; Gazzoni, G.; Hadjivasiliou, C.; Henrard, P.; Kozeiha, M.; Lefèvre, R.; Maratas, J.; Monteil, S.; Perret, P.; Vernet, M.
The journal of high energy physics, 10/2017 2017Journal Article
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√=13TeV, corresponding to an integrated luminosity of 279±11pb−1. The measurement is performed for J/ψ mesons with a transverse momentum of less than 10GeV/c in the rapidity range 2.0<y<4.5. The production cross-section is measured to be 13.5±0.9±0.8nb. 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.
