First observation of B+ → D s + K+K− decays and a search for B+ → D s + ϕ decays

A search for B+ → Ds+K+K− decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1, collected at centre-of-mass energies of 7, 8 and 13 TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined...

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Veröffentlicht in:	The journal of high energy physics 2018-01, Vol.2018 (1), p.1-22, Article 131
Hauptverfasser:	Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d’Argent, P., Arnau Romeu, J., Artamonov, A., Artuso, M., Aslanides, E., Atzeni, M., Auriemma, G., Baalouch, M., Babuschkin, I., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M.-O., van Beuzekom, M., Bezshyiko, Ia, Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bordyuzhin, I., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Britton, T., Brodzicka, J., Brundu, D., Buchanan, E., Burr, C.
Format:	Artikel
Sprache:	eng
Schlagworte:	B physics Branching fraction Confidence intervals Decay Hadron-Hadron scattering (experiments) High energy physics High Energy Physics - Experiment Large Hadron Collider Luminosity Physics Rare decay Searching Statistical analysis Uncertainty
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Beschreibung
Zusammenfassung:	A search for B+ → Ds+K+K− decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1, collected at centre-of-mass energies of 7, 8 and 13 TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined to beℬB+→Ds+K+K−=7.1±0.5±0.6±0.7×10−6,where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode B+→Ds+D¯0. A search is also performed for the pure annihilation decay B+ → Ds+ϕ. No significant signal is observed and a limit ofℬB+→Ds+ϕ
ISSN:	1029-8479 1126-6708 1029-8479
DOI:	10.1007/JHEP01(2018)131