Study of B<sup>0</sup><inf>(s)</inf> → K<sup>0</sup><inf>S</inf> h<sup>+</sup>h<sup>'-</sup> decays with first observation of B<sup>0</sup><inf>s</inf> → K<sup>0</sup><inf>S</inf> K<sup>±</sup> π<sup>±</sup> and B<sup>0</sup><inf>s</inf> → K<sup>0</sup><inf>S</inf> π<sup>+</sup> π<sup>-</sup>

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. A. Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. Andreassen, J. E. AndrewsR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, T. Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, I. Burducea, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, D. Campora Perez, A. Carbone

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Abstract

A search for charmless three-body decays of B0 and B 0s mesons with a K0S meson in the final state is performed using the pp collision data, corresponding to an integrated luminosity of 1:0 fb-1, collected at a centre-of-mass energy of 7TeV recorded by the LHCb experiment. Branching fractions of the B0(s) → K0S h+h'- decay modes (h(') = π,K), relative to the well measured B 0 → K0Sπ+π- decay, are obtained. First observation of the decay modes B0s → K0S K±π ± and B0s → K0Sπ+ π- and confirmation of the decay B0 → K0SK±π ± are reported. The following relative branching fraction measurements or limits are obtained B(B0 → K0S K±π±)/B(B0 → K0Sπ+ π-)=0:128 ± 0:017 (stat:) ± 0:009 (syst:) ; B(B0 → K0S K+K-)/B(B0 → K0Sπ+ π-)= 0:385 ± 0:031 (stat:) ± 0:023 (syst:) ; B(B0s → K0Sπ+ π-)/B(B0 → K 0Sπ+ π-)=0:29 ± 0:06 (stat:) ± 0:03 (syst:) ± 0:02 (fs=fd) ; B(B0s → K0sK±π ±)/B(B0 → K0Sπ +π-)= = 1:48 ± 0:12 (stat:) ± 0:08 (syst:) ± 0:12 (fs=fd) ; B(B0s → K0SK+K-)/B(B0 → K 0Sπ+π-)ε [0:004; 0:068] at 90% CL.
Original languageEnglish
JournalJournal of High Energy Physics
DOIs
Publication statusPublished - 1 Dec 2013
Externally publishedYes

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Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., ... Carbone, A. (2013). Study of B<sup>0</sup><inf>(s)</inf> → K<sup>0</sup><inf>S</inf> h<sup>+</sup>h<sup>'-</sup> decays with first observation of B<sup>0</sup><inf>s</inf> → K<sup>0</sup><inf>S</inf> K<sup>±</sup> π<sup>±</sup> and B<sup>0</sup><inf>s</inf> → K<sup>0</sup><inf>S</inf> π<sup>+</sup> π<sup>-</sup> Journal of High Energy Physics. https://doi.org/10.1007/JHEP10(2013)143