The first observations of B0→D¯∗(2007)0K+π- and Bs0→D¯∗(2007)0K-π+ decays are presented, and their branching fractions relative to that of the B0→D¯∗(2007)0π+π- decay are reported. These modes can potentially be used to investigate the spectroscopy of charm and charm-strange resonances and to determine the angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle. It is also important to understand them as a source of potential background in determinations of γ from B+→DK+ and B0→DK+π- decays. The analysis is based on a sample corresponding to an integrated luminosity of 5.4 fb-1 of proton-proton collision data at 13 TeV center-of-mass energy recorded with the LHCb detector. The D¯∗(2007)0 mesons are fully reconstructed in the D¯0π0 and D¯0γ channels with the D¯0→K+π- decay. A novel weighting method is used to subtract background while simultaneously applying an event-by-event efficiency correction to account for resonant structures in the decays.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Observation of the B0 → D ¯ ∗0K+π- and Bs0 → D ¯ ∗0K-π+ decays. PHYSICAL REVIEW D, 105(7) [10.1103/PhysRevD.105.072005].

Observation of the B0 → D ¯ ∗0K+π- and Bs0 → D ¯ ∗0K-π+ decays

Borsato M.;Calvi M.;Capelli S.;Cardini A.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Grillo L.;Khanji B.;Kucharczyk M.;Martinazzoli L.;Martinelli M.;Meloni S.;Minotti A.;Petruzzo M.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2022

Abstract

The first observations of B0→D¯∗(2007)0K+π- and Bs0→D¯∗(2007)0K-π+ decays are presented, and their branching fractions relative to that of the B0→D¯∗(2007)0π+π- decay are reported. These modes can potentially be used to investigate the spectroscopy of charm and charm-strange resonances and to determine the angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle. It is also important to understand them as a source of potential background in determinations of γ from B+→DK+ and B0→DK+π- decays. The analysis is based on a sample corresponding to an integrated luminosity of 5.4 fb-1 of proton-proton collision data at 13 TeV center-of-mass energy recorded with the LHCb detector. The D¯∗(2007)0 mesons are fully reconstructed in the D¯0π0 and D¯0γ channels with the D¯0→K+π- decay. A novel weighting method is used to subtract background while simultaneously applying an event-by-event efficiency correction to account for resonant structures in the decays.
Articolo in rivista - Articolo scientifico
Branching Fraction; Hadronic Decay; CP Violation; Flavor Physics; LHC; Hadron Collider
English
20-apr-2022
2022
105
7
072005
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2022). Observation of the B0 → D ¯ ∗0K+π- and Bs0 → D ¯ ∗0K-π+ decays. PHYSICAL REVIEW D, 105(7) [10.1103/PhysRevD.105.072005].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/377022
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