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Akar, S; Andrews, J E; Appleby, R B; Artamonov, A; Aslanides, E; Baker, S; Bellee, V; Benton, J; Billoir, P; Buchanan, E; Calvi, M; Carson, L; Charpentier, Ph; Clemencic, M; Collins, P; Cunliffe, S; D'Ambrosio, C; Deckenhoff, M; Dey, B; Eitschberger, U; Ekelhof, R; Evans, H M; Fazzini, D; Ferguson, D; Filippov, S; Fu, J; Gao, Y; Garcia Martin, L M; García Pardiñas, J; Gascon, D; Granado Cardoso, L A; Gruberg Cazon, B R; Harnew, N; Harrison, J; Head, T; Hussain, N; Kandybei, S; Kenzie, M; Klaver, S; Klimaszewski, K; Komarov, I; Krokovny, P; Kruse, F; Krzemien, W; Kucewicz, W; Lazzeroni, C; Lemaitre, F; Lemos Cid, E; Leverington, B; Lionetto, F; Longstaff, I; Machefert, F; Maltsev, T; Marino, P; Mathad, A; Matteuzzi, C; Morandin, M; Morawski, P; Muheim, F; Müller, K; Nguyen-Mau, C; Novoselov, A; Oblakowska-Mucha, A; Owen, P; Panman, J; Pappalardo, L L; Pastore, A; Penso, G; Pepe Altarelli, M; Petrov, A; Pinci, D; Poluektov, A; Popov, D; Prisciandaro, J; Robbe, P; Roiser, S; Romero Vidal, A; Saborido Silva, J J; Sanmartin Sedes, B; Santamarina Rios, C; Schmelzer, T; Sciascia, B; Serrano, J; Simone, S; Sirendi, M; Stenyakin, O; Sutcliffe, W; Szumlak, T; Teklishyn, M; Tobin, M; Tully, A; Uwer, U; de Vries, J A; Wallace, R; Watson, N K; Wyllie, K; Xie, Y; Yang, Z; Yin, H; Zhang, Y
Physical review letters, 2017-Feb-03, 20170203, 2017-02-03, Letnik: 118, Številka: 5Journal Article
Measurements of the cross section for producing b quarks in the reaction pp→bbover ¯X are reported in 7 and 13 TeV collisions at the LHC as a function of the pseudorapidity η in the range 2<η<5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered η range are 72.0±0.3±6.8 and 154.3±1.5±14.3 μb for 7 and 13 TeV. The ratio is 2.14±0.02±0.13, where the quoted uncertainties are statistical and systematic, respectively. The agreement with theoretical expectation is good at 7 TeV, but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower η than the model prediction.
