Observation of B0s→ K∗±K∓ and evidence for B0s→ K∗-π+decays

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonR. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

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Abstract

Measurements of the branching fractions of B0s→ K∗±K∓ and B0s→ K∗±π∓ decays are performed using a data sample corresponding to 1.0 fb-1of proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 7 TeV, where the K∗± mesons are reconstructed in the K0sπ± final state. The first observation of the B0s→ K∗±K∓ decay and the first evidence for the B0s→ K∗-π+decay are reported with branching fractions B(B0s→ K∗±K) = (12.7±1.9±1.9) x 10-6, B(B0s→ K∗-π+) = (3.3±1.1±0.5) x 10-6, where the first uncertainties are statistical and the second are systematic. In addition, an upper limit of B(B0→ K∗±K) < 0.4 (0.5) × 10-6 is set at 90% (95%) confidence level.

Original languageEnglish
Article number123001
Number of pages18
JournalNew Journal of Physics
Volume16
DOIs
Publication statusPublished - 2 Dec 2014

Keywords

  • B physics
  • branching fraction
  • flavour physics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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