The first observations of B 0 → ¯ D ∗ ( 2007 ) 0 K + π − and B 0 s → ¯ D ∗ ( 2007 ) 0 K − π + decays are presented, and their branching fractions relative to that of the B 0 → ¯ D ∗ ( 2007 ) 0 π + 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 + → D K + and B 0 → D K + 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 0 π 0 and ¯ D 0 γ 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.

Observation of the B0 → D ¯ ∗0K+π- and Bs0 → D ¯ ∗0K-π+ decays / Aaij, R., Abdelmotteleb, A.S.W., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0029. - 105:7(2022). [10.1103/PhysRevD.105.072005]

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

Casse, G.;Sarti, A.;
2022

Abstract

The first observations of B 0 → ¯ D ∗ ( 2007 ) 0 K + π − and B 0 s → ¯ D ∗ ( 2007 ) 0 K − π + decays are presented, and their branching fractions relative to that of the B 0 → ¯ D ∗ ( 2007 ) 0 π + 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 + → D K + and B 0 → D K + 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 0 π 0 and ¯ D 0 γ 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.
2022
branching fractions, LHCb, CERN, particles, CP violation
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the B0 → D ¯ ∗0K+π- and Bs0 → D ¯ ∗0K-π+ decays / Aaij, R., Abdelmotteleb, A.S.W., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0029. - 105:7(2022). [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/11573/1673196
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