The first observation of the B0s → Ds*∓ K± decay is reported using 3.0 fb^−1 of proton-proton collision data collected by the LHCb experiment. The Ds*∓ mesons are reconstructed through the decay chain Ds*∓ → γ Ds∓ (K∓ K± π∓). The branching fraction relative to that for B0s → Ds*− π+ decays is measured to be B(B0s → Ds*∓ K±)/B(B0s → Ds*− π+) = 0.068 ± 0.005{−0.002}{+0.003}, where the first uncertainty is statistical and the second is systematic. Using a recent measurement of B(B0s → Ds*− π+), the absolute branching fraction of B0s → Ds*∓ K± is measured as B(B0s → Ds*∓ K±) = (16.3 ± 1.2(stat) {−0.5}{+0.7}(syst) ± 4.8(norm)) × 10^−5, where the third uncertainty is due to the uncertainty on the branching fraction of the normalisation channel.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). First Observation and Measurement of the Branching Fraction for the Decay B0s → Ds*∓ K±. JOURNAL OF HIGH ENERGY PHYSICS, 2015(6), 0-15 [10.1007/JHEP06(2015)130].

First Observation and Measurement of the Branching Fraction for the Decay B0s → Ds*∓ K±

Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

The first observation of the B0s → Ds*∓ K± decay is reported using 3.0 fb^−1 of proton-proton collision data collected by the LHCb experiment. The Ds*∓ mesons are reconstructed through the decay chain Ds*∓ → γ Ds∓ (K∓ K± π∓). The branching fraction relative to that for B0s → Ds*− π+ decays is measured to be B(B0s → Ds*∓ K±)/B(B0s → Ds*− π+) = 0.068 ± 0.005{−0.002}{+0.003}, where the first uncertainty is statistical and the second is systematic. Using a recent measurement of B(B0s → Ds*− π+), the absolute branching fraction of B0s → Ds*∓ K± is measured as B(B0s → Ds*∓ K±) = (16.3 ± 1.2(stat) {−0.5}{+0.7}(syst) ± 4.8(norm)) × 10^−5, where the third uncertainty is due to the uncertainty on the branching fraction of the normalisation channel.
2015
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). First Observation and Measurement of the Branching Fraction for the Decay B0s → Ds*∓ K±. JOURNAL OF HIGH ENERGY PHYSICS, 2015(6), 0-15 [10.1007/JHEP06(2015)130].
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/515020
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