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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Resumen

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.

Idioma originalEnglish
Número de artículo112005
PublicaciónPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volumen86
N.º11
DOI
EstadoPublished - 20 dic 2012
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Física nuclear y de alta energía
  • Física y astronomía (miscelánea)

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Profundice en los temas de investigación de '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>'. En conjunto forman una huella única.

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