A branching fraction measurement of the B0→Ds+π- decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb-1. The branching fraction is found to be B(B0→Ds+π-)=(19.4±1.8 ± 1.3 ± 1.2) × 10 - 6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B→ D-π+, Ds+→K+K-π+ and D-→ K+π-π- branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/ fd is measured through B¯s0→Ds+π- and B→ D-π+ decays.

Aaij, R., Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Measurement of the branching fraction of the B0→Ds+π- decay. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 81(4) [10.1140/epjc/s10052-020-08790-2].

Measurement of the branching fraction of the B0→Ds+π- decay

Borsato M.;Calvi M.
Membro del Collaboration Group
;
Capelli S.
Membro del Collaboration Group
;
Carniti P.
Membro del Collaboration Group
;
Fazzini D.
Membro del Collaboration Group
;
Gotti C.
Membro del Collaboration Group
;
Martinazzoli L.
Membro del Collaboration Group
;
Martinelli M.
Membro del Collaboration Group
;
Meloni S.
Membro del Collaboration Group
;
Petruzzo M.
Membro del Collaboration Group
;
Shields E. B.
Membro del Collaboration Group
;
2021

Abstract

A branching fraction measurement of the B0→Ds+π- decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb-1. The branching fraction is found to be B(B0→Ds+π-)=(19.4±1.8 ± 1.3 ± 1.2) × 10 - 6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B→ D-π+, Ds+→K+K-π+ and D-→ K+π-π- branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/ fd is measured through B¯s0→Ds+π- and B→ D-π+ decays.
Articolo in rivista - Articolo scientifico
Flavour Physics;
English
2021
81
4
314
open
Aaij, R., Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Measurement of the branching fraction of the B0→Ds+π- decay. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 81(4) [10.1140/epjc/s10052-020-08790-2].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/374925
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