The branching fraction and direct CP asymmetry of the decay B +. J/.. + are measured using protonproton collision data collected with the LHCb detector at centre- of- mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3 fb - 1. The following results are obtained: ( B +. J/.. +) = ( 3.81 + 0.25 - 0.24 +/- 0.35) x 10 - 5, ACP ( B +. J/.. +) = - 0.045 + 0.056 - 0.057 +/- 0.008, where the first uncertainties are statistical and the second systematic. Both measurements are the most precise to date.
Aaij, R., Beteta, C.a., Adeva, B., Adinolfi, M., Aidala, C.a., Ajaltouni, Z., et al. (2019). Measurement of the branching fraction and CP asymmetry in B plus . J/.. plus decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 79(6) [10.1140/epjc/s10052-019-6698-3].
Measurement of the branching fraction and CP asymmetry in B plus . J/.. plus decays
Archilli, F.;Santovetti, E.Membro del Collaboration Group
;
2019-01-01
Abstract
The branching fraction and direct CP asymmetry of the decay B +. J/.. + are measured using protonproton collision data collected with the LHCb detector at centre- of- mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3 fb - 1. The following results are obtained: ( B +. J/.. +) = ( 3.81 + 0.25 - 0.24 +/- 0.35) x 10 - 5, ACP ( B +. J/.. +) = - 0.045 + 0.056 - 0.057 +/- 0.008, where the first uncertainties are statistical and the second systematic. Both measurements are the most precise to date.| File | Dimensione | Formato | |
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