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Title: Observation of the decay B0 ⎯⎯⎯⎯⎯ 0 → D K K −
Author: Alfonso Albero, Alejandro
Calvo Gomez, Miriam
Camboni, Alessandro
Coquereau, Samuel
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Gran Col·lisionador d'Hadrons
Particle physics
Large Hadron Collider (France and Switzerland)
Issue Date: 5-Jul-2018
Publisher: Elsevier B.V.
Abstract: The first observation of the B0 s → D¯ 0KþK− decay is reported, together with the most precise branching fraction measurement of the mode B0 → D¯ 0KþK−. The results are obtained from an analysis of pp collision data corresponding to an integrated luminosity of 3.0 fb−1. The data were collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV. The branching fraction of the B0 → D¯ 0KþK− decay is measured relative to that of the decay B0 → D¯ 0πþπ− to be BðB0→D¯ 0KþK−Þ BðB0→D¯ 0πþπ−Þ ¼ ð6.9 0.4 0.3Þ%, where the first uncertainty is statistical and the second is systematic. The measured branching fraction of the B0 s → D¯ 0KþK− decay mode relative to that of the corresponding B0 decay is BðB0 s→D¯ 0KþK−Þ BðB0→D¯ 0KþK−Þ ¼ ð93.0 8.9 6.9Þ%. Using the known branching fraction of B0 → D¯ 0πþπ−, the values of BðB0 →D¯ 0KþK−Þ¼ð6.Þ×10−5 and BðB0 s →D¯ 0KþK−Þ¼ð5.Þ×10−5 are obtained, where the third uncertainties arise from the branching fraction of the decay modes B0 → D¯ 0πþπ− and B0 → D¯ 0KþK−, respectively
Note: Reproducció del document publicat a:
It is part of: Physics Reports-Review Section of Physics Letters, 2018, vol. 98, num. 072006
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ISSN: 0370-1573
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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