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  • Measurement of differential bb¯- and cc¯-dijet cross-sections in the forward region of pp collisions at s = 13 TeV
    Alexander, M.; Baryshnikov, F.; Belov, I.; Berezhnoy, A.; Bettler, M. O.; Blusk, S.; Calvi, M.; Campora Perez, D. H.; Campoverde Quezada, A. F.; Carli, I.; Chernov, A.; Chulikov, V.; Cid Vidal, X.; Coombs, G.; Currie, R.; Dijkstra, H.; Donohoe, A. M.; Ene, A.; Farley, N.; Ferro-Luzzi, M.; Forty, R.; Franco Sevilla, M.; Gallorini, S.; Gascon, D.; Geertsema, R. E.; Gerick, D.; Gomez Fernandez, S.; Granado Cardoso, L. A.; Greeven, L. M.; Halewood-leagas, T.; Hecker, M.; Heinicke, K.; Ilten, P.; Jurik, N.; Kenzie, M.; Kudryavtsev, V.; Lampis, A.; Lane, R.; Leflat, A.; Leroy, O.; Lovell, G. H.; Lupato, A.; Lusiani, A.; Maddrell-Mander, S.; Maev, O.; Maratas, J.; Marchand, J. F.; Marino, P.; Martinelli, M.; Materok, M.; Matev, R.; Mcgrath, T. H.; McNab, A.; Meadows, B.; Merk, M.; Meyer Garcia, L.; Mitzel, D. S.; Monteil, S.; Moron, J.; Mountain, R.; Mukherjee, M.; Nandakumar, R.; Nanut, T.; Nguyen-Mau, C.; Owen, P.; Passaleva, G.; Petrolini, A.; Petruzzo, M.; Pinci, D.; Placinta, V.; Plo Casasus, M.; Polci, F.; Polukhina, N.; Rama, M.; Raven, G.; Richards, D. S.; Rodrigues, E.; Santacesaria, R.; Sarpis, G.; Shekhtman, L.; Shen, Z.; Shupperd, J. D.; Szymanski, M.; Torres Machado, D.; Tsaregorodtsev, A.; Tuci, G.; Uwer, U.; Van Hecke, H.; Vecchi, S.; Vieira, D.; Wang, J.; Williams, M. R. J.; Witola, L.; Wotton, S. A.; Wu, H.; Wyllie, K.; Xiang, Z.; Xu, Q.; Zhou, X.; Zhou, Y.

    The journal of high energy physics, 02/2021, Letnik: 2021, Številka: 2
    Journal Article

    A bstract The inclusive b b ¯ - and c c ¯ -dijet production cross-sections in the forward region of pp collisions are measured using a data sample collected with the LHCb detector at a centre-of-mass energy of 13 TeV in 2016. The data sample corresponds to an integrated luminosity of 1.6 fb − 1 . Differential cross-sections are measured as a function of the transverse momentum and of the pseudorapidity of the leading jet, of the rapidity difference between the jets, and of the dijet invariant mass. A fiducial region for the measurement is defined by requiring that the two jets originating from the two b or c quarks are emitted with transverse momentum greater than 20 GeV/ c , pseudorapidity in the range 2 . 2 < η < 4 . 2, and with a difference in the azimuthal angle between the two jets greater than 1.5. The integrated b b ¯ -dijet cross-section is measured to be 53 . 0 ± 9 . 7 nb, and the total c c ¯ -dijet cross-section is measured to be 73 ± 16 nb. The ratio between c c ¯ - and b b ¯ -dijet cross-sections is also measured and found to be 1 . 37 ± 0 . 27. The results are in agreement with theoretical predictions at next-to-leading order.

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