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Measurement of the B s0→J/ψK S0 branching fraction

  • Author(s): Aaij, R
  • Abellan Beteta, C
  • Adeva, B
  • Adinolfi, M
  • Adrover, C
  • Affolder, A
  • Ajaltouni, Z
  • Albrecht, J
  • Alessio, F
  • Alexander, M
  • Ali, S
  • Alkhazov, G
  • Alvarez Cartelle, P
  • Alves, AA
  • Amato, S
  • Amhis, Y
  • Anderson, J
  • Appleby, RB
  • Aquines Gutierrez, O
  • Archilli, F
  • Arrabito, L
  • Artamonov, A
  • Artuso, M
  • Aslanides, E
  • Auriemma, G
  • Bachmann, S
  • Back, JJ
  • Balagura, V
  • Baldini, W
  • Barlow, RJ
  • Barschel, C
  • Barsuk, S
  • Barter, W
  • Bates, A
  • Bauer, C
  • Bauer, T
  • Bay, A
  • Bediaga, I
  • Belogurov, S
  • Belous, K
  • Belyaev, I
  • Ben-Haim, E
  • Benayoun, M
  • Bencivenni, G
  • Benson, S
  • Benton, J
  • Bernet, R
  • Bettler, MO
  • van Beuzekom, M
  • Bien, A
  • Bifani, S
  • Bird, T
  • Bizzeti, A
  • Bjørnstad, PM
  • Blake, T
  • Blanc, F
  • Blanks, C
  • Blouw, J
  • Blusk, S
  • Bobrov, A
  • Bocci, V
  • Bondar, A
  • Bondar, N
  • Bonivento, W
  • Borghi, S
  • Borgia, A
  • Bowcock, TJV
  • Bozzi, C
  • Brambach, T
  • van den Brand, J
  • Bressieux, J
  • Brett, D
  • Britsch, M
  • Britton, T
  • Brook, NH
  • Brown, H
  • Büchler-Germann, A
  • Burducea, I
  • Bursche, A
  • Buytaert, J
  • Cadeddu, S
  • Callot, O
  • Calvi, M
  • Calvo Gomez, M
  • Camboni, A
  • Campana, P
  • Carbone, A
  • Carboni, G
  • Cardinale, R
  • Cardini, A
  • Carson, L
  • Carvalho Akiba, K
  • Casse, G
  • Cattaneo, M
  • et al.
Abstract

The B s0→J/ψK S0 branching fraction is measured in a data sample corresponding to 0.41fb -1 of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to the penguin contributions affecting the sin2β measurement from B 0→J/ψK S0. The time-integrated branching fraction is measured to be B(B S0→J/ψK S0)=(1.83±0.28)×10 -5. This is the most precise measurement to date. © 2012 CERN.

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