First observations of B̄s0→D+D-, Ds+D- and D0D̄0 decays

R. Aaij, C. Abellan Beteta, 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, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, A. Bay, J. Beddow, F. Bedeschi, 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. 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, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, H. Carranza-Mejia, L. Carson, K. Carvalho Akiba, G. Casse, M. Cattaneo

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18 Citations (Scopus)

Abstract

First observations and measurements of the branching fractions of the B̄s0→D +D -, B̄s0→Ds+D - and B̄s0→D0D ̄0 decays are presented using 1.0 fb -1 of data collected by the LHCb experiment. These branching fractions are normalized to those of B ̄0→D +D -, B0→D -Ds+ and B -→D0Ds- , respectively. An excess of events consistent with the decay B ̄0→D0D ̄0 is also seen, and its branching fraction is measured relative to that of B -→D0Ds-. Improved measurements of the branching fractions B(B̄s0→Ds+Ds-) and B(B -→D0Ds-) are reported, each relative to B(B0→D -Ds+). The ratios of branching fractions are B(B̄s0→D +D -)B(B ̄0→D +D -)=1.08±0.20±0.10, B(B̄s0→Ds+D -)B(B0→D -Ds+)=0.050±0.008±0.004, B(B̄s0→D0D ̄0)B(B -→D0Ds-)=0. 019±0.003±0.003, B(B ̄0→D0D ̄0)B(B -→D0Ds-)<0.0024 at 90% CL, B(B̄s0→Ds+Ds-)B(B0→D -Ds+)=0.56±0.03±0. 04, B(B -→D0Ds-)B(B0→D -Ds+)=1.22±0. 02±0.07, where the uncertainties are statistical and systematic, respectively.

Original languageEnglish
Article number092007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number9
DOIs
Publication statusPublished - 21 May 2013
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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