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 5.0 fb^−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 B0 → 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 f_s/f_d is measured through anti-B0s → Ds+ π− and B0 → D− π+ decays.

Aaij, R., Abellán 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), 1-15 [10.1140/epjc/s10052-020-08790-2].

Measurement of the Branching Fraction of the B0 → Ds+ π− Decay

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Pisani, F.;Zucchelli, S.;
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 5.0 fb^−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 B0 → 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 f_s/f_d is measured through anti-B0s → Ds+ π− and B0 → D− π+ decays.
2021
Aaij, R., Abellán 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), 1-15 [10.1140/epjc/s10052-020-08790-2].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/848985
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