A branching fraction measurement of theB0→D+s 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→D+s π−) = (19.4±1.8 ± 1.3 ± 1.2) × 10−6, where the first uncertainty isstatistical, the second systematic and the third is due tothe uncertainty on the B0→D−π+, D+s →K +K −π+ andD−→K +π−π− branching fractions. This is the most precise single measurement of this quantity to date. As thisdecay proceeds through a single amplitude involving ab→u charged-current transition, the result provides information on non-factorisable strong interaction effects and themagnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence ofthe hadronisation-fraction ratio fs/ fd is measured throughB0s→D+s π− and B0→D−π+ decays.

Measurement of the branching fraction of the B0→Ds+π- decay / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 81:4(2021). [10.1140/epjc/s10052-020-08790-2]

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

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2021

Abstract

A branching fraction measurement of theB0→D+s 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→D+s π−) = (19.4±1.8 ± 1.3 ± 1.2) × 10−6, where the first uncertainty isstatistical, the second systematic and the third is due tothe uncertainty on the B0→D−π+, D+s →K +K −π+ andD−→K +π−π− branching fractions. This is the most precise single measurement of this quantity to date. As thisdecay proceeds through a single amplitude involving ab→u charged-current transition, the result provides information on non-factorisable strong interaction effects and themagnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence ofthe hadronisation-fraction ratio fs/ fd is measured throughB0s→D+s π− and B0→D−π+ decays.
2021
B physics; branching fraction; flavour changing neutral currents; Hadron- Hadron scattering (experiments); rare decay
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the branching fraction of the B0→Ds+π- decay / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 81:4(2021). [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/11573/1579946
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