First observation of the decays B̄(s)0→Ds+K <sup>-</sup>π<sup>+</sup>π<sup>-</sup> and B̄s0→D <inf>s1</inf>(2536)<sup>+</sup>π<sup>-</sup>

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, L. Anderlini, J. Anderson, R. B. ApplebyO. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, A. Bates, Th Bauer, A. Bay, J. Beddow, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, 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. Bjornstad, T. Blake, F. Blanc, C. Blanks, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, A. Büchler-Germann, I. Burducea, A. Bursche, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, A. Carbone, G. Carboni

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Abstract

The first observation of the decays B̄s0→Ds+K -π +π - and B ̄0→ Ds+K -π +π - are reported using an integrated luminosity of 1.0 fb -1 recorded by the LHCb experiment. The branching fractions, normalized with respect to B̄s0→Ds+π -π +π - and B̄s0→Ds+K -π +π -, respectively, are measured to be B(B̄s0→Ds+K -π +π -) B(B̄s0→Ds+π -π +π -)=(5. 2±0.5±0.3)×10 -2 and B(B ̄0→ Ds+K -π +π -)B(B̄s0→Ds+K -π +π -)=0.54±0.07±0.07, where the first uncertainty is statistical and the second is systematic. The B̄s0→Ds+K -π +π - decay is of particular interest as it can be used to measure the weak phase γ. First observation of the B̄s0→D s1(2536) +π -, Ds1+→Ds+π -π + decay is also presented, and its branching fraction relative to B̄s0→Ds+π -π +π - is found to be B(B̄s0→ D s1(2536) +π -,Ds1+→Ds+π -π +)B(B̄s0→Ds+π -π +π -)=(4.0±1.0±0.4) ×10 -3.

Original languageEnglish
Article number112005
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number11
DOIs
Publication statusPublished - 20 Dec 2012
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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