Measurement of the charge asymmetry in B±→φK± and search for B±→φπ± decays

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, Jr A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenJ. 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, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, S. Bifani, 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

The CP-violating charge asymmetry in B± → φK± decays is measured in a sample of pp collisions at 7 TeV centre-of-mass energy, corresponding to an integrated luminosity of 1.0 fb-1 collected by the LHCb experiment. The result is ACP( B± → φK±) = 0.022 ± 0.021 ± 0.009, where the first uncertainty is statistical and the second systematic. In addition, a search for the B± → φπ± decay mode is performed, using the B± → φK± decay rate for normalization. An upper limit on the branching fraction β(B± → φπ±) < 1.5 × 10-7 is set at 90% confidence level.

Original languageEnglish
Pages (from-to)85-94
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume728
Early online date22 Nov 2013
DOIs
Publication statusPublished - 20 Jan 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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