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Title: Observation of the decay Bs0→D¯0K+K−
Author: Alfonso Albero, Alejandro
Calvo Gomez, M.
Camboni, Alessandro
Coquereau, Samuel
Garrido Beltrán, Lluís
Gascon, D.
Gironella Gironell, P.
Graciani Díazaz, Ricardo
Graugés Pous, Eugeni
Vazquez Gomez, R.
Marin Benito, Carla
LHCb Collaboration
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: 2018
Publisher: American Physical Society
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: Physical Review D, 2018, vol. 2021, p. 1-19
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ISSN: 2470-0010
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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