TY - JOUR AU - LHCb Collaboration (Aaij, R. et al AU - Garcia Martin, L. M. AU - Henry, L. AU - Martinez-Vidal, F. AU - Oyanguren, A. AU - Remon Alepuz, C. AU - Ruiz Vidal, J. AU - Sanchez Mayordomo, C. PY - 2019 DA - 2019// TI - Measurement of the branching fraction and CP asymmetry in B plus . J/.. plus decays T2 - Eur. Phys. J. C JO - European Physical Journal C SP - 537 - 13pp VL - 79 IS - 6 PB - Springer AB - 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. SN - 1434-6044 UR - https://arxiv.org/abs/1812.07041 UR - https://doi.org/10.1140/epjc/s10052-019-6698-3 DO - 10.1140/epjc/s10052-019-6698-3 LA - English N1 - WOS:000472947700001 ID - LHCbCollaborationAaij_etal2019 ER -