Observation of the <i>B</i><SUP>0</SUP> → (<i>D</i>)over-bar*<SUP>0</SUP><i>K</i><SUP>+</SUP> π<SUP>-</SUP> and <i>B</i><sub>s</sub><SUP>0</SUP> → (<i>D</i>)over-bar*<SUP>0</SUP><i>K</i><SUP>-</SUP>π<SUP>+</SUP> decays



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Abudinen, F, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 992 more authors) (2022) Observation of the <i>B</i><SUP>0</SUP> → (<i>D</i>)over-bar*<SUP>0</SUP><i>K</i><SUP>+</SUP> π<SUP>-</SUP> and <i>B</i><sub>s</sub><SUP>0</SUP> → (<i>D</i>)over-bar*<SUP>0</SUP><i>K</i><SUP>-</SUP>π<SUP>+</SUP> decays. PHYSICAL REVIEW D, 105 (7). 072005-.

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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.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 17 May 2022 11:19
Last Modified: 14 Mar 2024 22:56
DOI: 10.1103/PhysRevD.105.072005
Open Access URL: https://journals.aps.org/prd/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3154962