The element |V_cb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic B0s decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb^−1. Rates of B0s → Ds− μ+ ν_μ and B0s → Ds*− μ+ ν_μ decays are analyzed using hadronic form-factor parametrizations derived either by Caprini, Lellouch and Neubert (CLN) or by Boyd, Grinstein and Lebed (BGL). The measured values of |V_cb| are (41.4 ± 0.6 ± 0.9 ± 1.2) × 10^−3 and (42.3 ± 0.8 ± 0.9 ± 1.2) × 10^−3 in the CLN and BGL parametrization, respectively. The first uncertainty is statistical, the second systematic, and the third is due to the external inputs used in the measurement. These results are in agreement with those obtained from decays of B+ and B0 mesons. They are the first determinations of |V_cb| at a hadron-collider experiment and the first using B0s meson decays.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of |V_cb| with B0s → Ds(*)− μ+ ν_μ Decays. PHYSICAL REVIEW D, 101(7), 1-25 [10.1103/PhysRevD.101.072004].

Measurement of |V_cb| with B0s → Ds(*)− μ+ ν_μ Decays

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Zucchelli, S.
2020

Abstract

The element |V_cb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic B0s decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb^−1. Rates of B0s → Ds− μ+ ν_μ and B0s → Ds*− μ+ ν_μ decays are analyzed using hadronic form-factor parametrizations derived either by Caprini, Lellouch and Neubert (CLN) or by Boyd, Grinstein and Lebed (BGL). The measured values of |V_cb| are (41.4 ± 0.6 ± 0.9 ± 1.2) × 10^−3 and (42.3 ± 0.8 ± 0.9 ± 1.2) × 10^−3 in the CLN and BGL parametrization, respectively. The first uncertainty is statistical, the second systematic, and the third is due to the external inputs used in the measurement. These results are in agreement with those obtained from decays of B+ and B0 mesons. They are the first determinations of |V_cb| at a hadron-collider experiment and the first using B0s meson decays.
2020
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of |V_cb| with B0s → Ds(*)− μ+ ν_μ Decays. PHYSICAL REVIEW D, 101(7), 1-25 [10.1103/PhysRevD.101.072004].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/772375
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