Measurement of the B-0 -> K*(0) e(+) e(-) branching fraction at low dilepton mass

R. Aaij*, C.A. Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P.A. Cartelle, A.A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenR.B. Appleby, O.A. Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemmam, S. Bachmann, J.J. Back, C. Baesso, V. Balagura, W. Baldini, R.J. Barlow, C. Barsche, S. Barsuk, W. Barter, T. Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediagal, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, J. van den Brand

*Corresponding author for this work

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Abstract

The branching fraction of the rare decay B-0 -> K*(0) e(+) e(-) in the dilepton mass region from 30 to 1000 MeV/c(2) has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb(-1), at a centre-of-mass energy of 7 TeV. The decay mode B-0 -> J/psi (e(+) e(-)) K*(0) is utilized as a normalization channel. The branching fraction B(B-0 -> K*(0) e(+) e(-)) is measured to beB(B-0 -> K*(0) e(+) e(-))(30-1000 MeV/c2) = (3.1(-0.8)(-0.3)(+0.9)(+0.2) +/- 0.2) x 10(-7)where the fi rst error is statistical, the second is systematic, and the third comes from the uncertainties on the B-0 -> J/K*(0) and J/psi -> e(+) e(-) branching fractions.
Original languageEnglish
Article number159
Number of pages18
JournalJournal of High Energy Physics
Issue number5
DOIs
Publication statusPublished - 1 May 2013
Externally publishedYes

Keywords

  • Rare decay
  • Hadron-Hadron Scattering
  • Branching fraction
  • B physics
  • Flavour Changing Neutral Currents
  • DECAY
  • TOOL

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