Measurements of the branching fractions of B<inf>s</inf><sup>0</sup> → K∗<sup>±</sup>K<sup>∓</sup> and B<inf>s</inf><sup>0</sup> → K∗<sup>±</sup>π<sup>∓</sup> decays are performed using a data sample corresponding to 1.0 fb<sup>-1</sup> of proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 7 TeV, where the K∗<sup>±</sup> mesons are reconstructed in the K<inf>S</inf><sup>0</sup> π<sup>±</sup> final state. The first observation of the B<inf>s</inf><sup>0</sup> → K∗<sup>±</sup>K<sup>∓</sup> decay and the first evidence for the B<inf>s</inf><sup>0</sup> → K∗<sup>-</sup> π<sup>+</sup> decay are reported with branching fractions B(B<inf>s</inf><sup>0</sup>→ K∗<sup>±</sup>K<sup>∓</sup>) = (12.7 ± 1.9 ± 1.9) × 10<sup>-6</sup>, B(B<inf>s</inf><sup>0</sup> → K∗<sup>-</sup>π<sup>+</sup>) = (3.3 ± 1.1 ± 0.5) × 10<sup>-6</sup>, where the first uncertainties are statistical and the second are systematic. In addition, an upper limit of B(B<sup>0</sup> → K∗<sup>±</sup>K<sup>∓</sup>) < 0.4 (0.5) × 10<sup>-6</sup> is set at 90% (95%) confidence level.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2014). Observation of Bs0 → K∗± K∓ and evidence for Bs0 → K∗- π+ decays. NEW JOURNAL OF PHYSICS, 16 [10.1088/1367-2630/16/12/123001].

Observation of Bs0 → K∗± K∓ and evidence for Bs0 → K∗- π+ decays

Borsato, M;CALVI, MARTA;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;KUCHARCZYK, MARCIN;Martinelli, M;
2014

Abstract

Measurements of the branching fractions of Bs0 → K∗±K and Bs0 → K∗±π decays are performed using a data sample corresponding to 1.0 fb-1 of proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 7 TeV, where the K∗± mesons are reconstructed in the KS0 π± final state. The first observation of the Bs0 → K∗±K decay and the first evidence for the Bs0 → K∗- π+ decay are reported with branching fractions B(Bs0→ K∗±K) = (12.7 ± 1.9 ± 1.9) × 10-6, B(Bs0 → K∗-π+) = (3.3 ± 1.1 ± 0.5) × 10-6, where the first uncertainties are statistical and the second are systematic. In addition, an upper limit of B(B0 → K∗±K) < 0.4 (0.5) × 10-6 is set at 90% (95%) confidence level.
Articolo in rivista - Articolo scientifico
B physics; branching fraction; flavour physics; Physics and Astronomy (all)
English
2014
16
123001
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2014). Observation of Bs0 → K∗± K∓ and evidence for Bs0 → K∗- π+ decays. NEW JOURNAL OF PHYSICS, 16 [10.1088/1367-2630/16/12/123001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/89366
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