The decay of the narrow resonance anti-B0*_s2 → B− K+ can be used to determine the B− momentum in partially reconstructed decays without any assumptions on the decay products of the B− meson. This technique is employed for the first time to distinguish contributions from D0, D0*, and higher-mass charmed states (D0**) in semileptonic B− decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0 fb^−1 collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive B− → D0 X μ− anti-ν_μ are f_D0 = B(B− → D0 μ− anti-ν_μ) / B(B− → D0 X μ− anti-ν_μ) = 0.25 ± 0.06, f_D0** = B(B− → (D0** → D0 X) μ− anti-ν_μ) / B(B− → D0 X μ− anti-ν_μ) = 0.21 ± 0.07, with f_D0* = 1 − f_D0 − f_D0** making up the remainder.

Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2019). Measurement of the Relative B− → D0/D0*/D0** μ− anti-ν_μ Branching Fractions Using B− Mesons from anti-B0*_s2 Decays. PHYSICAL REVIEW D, 99(9), 1-16 [10.1103/PhysRevD.99.092009].

Measurement of the Relative B− → D0/D0*/D0** μ− anti-ν_μ Branching Fractions Using B− Mesons from anti-B0*_s2 Decays

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2019

Abstract

The decay of the narrow resonance anti-B0*_s2 → B− K+ can be used to determine the B− momentum in partially reconstructed decays without any assumptions on the decay products of the B− meson. This technique is employed for the first time to distinguish contributions from D0, D0*, and higher-mass charmed states (D0**) in semileptonic B− decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0 fb^−1 collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive B− → D0 X μ− anti-ν_μ are f_D0 = B(B− → D0 μ− anti-ν_μ) / B(B− → D0 X μ− anti-ν_μ) = 0.25 ± 0.06, f_D0** = B(B− → (D0** → D0 X) μ− anti-ν_μ) / B(B− → D0 X μ− anti-ν_μ) = 0.21 ± 0.07, with f_D0* = 1 − f_D0 − f_D0** making up the remainder.
2019
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2019). Measurement of the Relative B− → D0/D0*/D0** μ− anti-ν_μ Branching Fractions Using B− Mesons from anti-B0*_s2 Decays. PHYSICAL REVIEW D, 99(9), 1-16 [10.1103/PhysRevD.99.092009].
Aaij, R.; Adeva, B.; Adinolfi, M.; Aidala, C.A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/688872
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