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Adrover, C.; Ajaltouni, Z.; Alessio, F.; Artamonov, A.; Benson, S.; van Beuzekom, M.; Blake, T.; Bobrov, A.; Britsch, M.; Buytaert, J.; Calvi, M.; Cid Vidal, X.; Cliff, H. V.; Coca, C.; Corti, G.; Cowan, G. A.; Craik, D.; D’Ambrosio, C.; De Paula, L.; Derkach, D.; Dettori, F.; Di Canto, A.; Donleavy, S.; Dovbnya, A.; Dzhelyadin, R.; van Eijk, D.; Eitschberger, U.; Elsby, D.; Farry, S.; Fernandez Albor, V.; Fontana, M.; Francisco, O.; Garrido, L.; Gauld, R.; Gersabeck, M.; Göbel, C.; Gomes, A.; Harrison, J.; Hartmann, T.; Hernando Morata, J. A.; Hicks, E.; Johnson, D.; Jost, B.; Kenyon, I. R.; Koppenburg, P.; Kreplin, K.; Kruse, F.; Kvaratskheliya, T.; Lacarrere, D.; Lafferty, G.; Lai, A.; Lazzeroni, C.; Lees, J.-P.; Lefrançois, J.; Liles, M.; Luo, H.; Mancinelli, G.; Märki, R.; Martinez Santos, D.; Martins Tostes, D.; Mathe, Z.; Matveev, M.; Maurice, E.; Müller, K.; Muster, B.; Nguyen, T. D.; Oldeman, R.; Pal, B. K.; Panman, J.; Parkinson, C. J.; Patel, G. D.; Perazzini, S.; Perez Trigo, E.; Pessina, G.; Petridis, K.; Pilař, T.; Raven, G.; Sarti, A.; Schleich, S.; Schlupp, M.; Schmidt, B.; Sciubba, A.; Seco, M.; Shatalov, P.; Shires, A.; Storaci, B.; Straumann, U.; Swientek, S.; Szczypka, P.; Vieira, D.; Vilasis-Cardona, X.; Wallace, R.; Webber, A. D.; Williams, M.; Wright, S.; Wu, S.; Xie, Y.; Yang, Z.; Zhang, F.; Zhang, L.
The journal of high energy physics, 04/2013, Letnik: 2013, Številka: 4Journal Article
A bstract The relative production rate of $ B_s^0 $ and B 0 mesons is determined with the hadronic decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B 0 → D − K + . The measurement uses data corresponding to 1.0 fb −1 of pp collisions at a centre-of-mass energy of $ \sqrt{s}=7 $ TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, f s /f d , is measured to be 0 . 238 ± 0 . 004 ± 0 . 015 ± 0 . 021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain f s /f d = 0 . 256 ± 0 . 020. The dependence of f s /f d on the transverse momentum and pseudorapidity of the B meson is determined using the decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B 0 → D − π + . There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B 0 → D − K + and B 0 → D − π + is measured to be 0 . 0822 ± 0 . 0011 (stat) ± 0 . 0025 (syst).
