The Bþ → DþKþπ− decay is observed in a data sample corresponding to 3.0 fb−1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. The signal significance is 8σ and the branching fraction is measured to be BðBþ → DþKþπ−Þ¼ð5.31 0.90 0.48 0.35Þ × 10−6, where the uncertainties are statistical, systematic and due to the normalization mode Bþ → D−Kþπþ, respectively. The Dalitz plot appears to be dominated by broad structures. Angular distributions are exploited to search for quasi-two-body contributions from Bþ → D 2ð2460Þ0Kþ and Bþ → DþKð892Þ0 decays. No significant signals are observed and upper limits are set on their branching fractions.

First observation of the rare B+ →d+K+π- decay / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:5(2016). [10.1103/PhysRevD.93.051101]

First observation of the rare B+ →d+K+π- decay

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

The Bþ → DþKþπ− decay is observed in a data sample corresponding to 3.0 fb−1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. The signal significance is 8σ and the branching fraction is measured to be BðBþ → DþKþπ−Þ¼ð5.31 0.90 0.48 0.35Þ × 10−6, where the uncertainties are statistical, systematic and due to the normalization mode Bþ → D−Kþπþ, respectively. The Dalitz plot appears to be dominated by broad structures. Angular distributions are exploited to search for quasi-two-body contributions from Bþ → D 2ð2460Þ0Kþ and Bþ → DþKð892Þ0 decays. No significant signals are observed and upper limits are set on their branching fractions.
2016
Charm physics; CP violation; Flavor physics; Hadron-Hadron Scattering; Nuclear and High Energy Physics
01 Pubblicazione su rivista::01a Articolo in rivista
First observation of the rare B+ →d+K+π- decay / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:5(2016). [10.1103/PhysRevD.93.051101]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074095
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