Determination of fs/fd for 7 TeV pp Collisions and Measurement of the B0→D−K+ Branching Fraction
| Autor: | Calvo Gómez, Míriam, Camboni, Alessandro, Enterria i Adan, David G. d', Garrido Beltrán, Lluís, Grabalosa Gándara, Marc, Graciani Díaz, Ricardo, Graugés Pous, Eugeni, López Asamar, Elias, Musy, Marco, Pérez-Calero Yzquierdo, Antonio, Pie Valls, B. (Blai), Potterat, Cédric, Puig Navarro, Albert, Ruiz, Hugo (Ruiz Pérez), Vázquez Gómez, Ricard, Vilasis-Cardona, Xavier, LHCb Collaboration |
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| Přispěvatelé: | Universitat de Barcelona |
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| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona |
| Popis: | The relative abundance of the three decay modes B 0 → D − K + , B 0 → D − π + , and B 0 s → D − s π + produced in 7 TeV p p collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb − 1 . The branching fraction of B 0 → D − K + is found to be B ( B 0 → D − K + ) = ( 2.01 ± 0.18 stat ± 0.14 syst ) × 10 − 4 . The ratio of fragmentation fractions f s / f d is determined through the relative abundance of B 0 s → D − s π + to B 0 → D − K + and B 0 → D − π + , leading to f s / f d = 0.253 ± 0.017 ± 0.017 ± 0.020 , where the uncertainties are statistical, systematic, and theoretical, respectively. |
| Databáze: | OpenAIRE |
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