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First measurement of the CP-violating phase ϕsdd¯ in Bs0 → (K + π )(K π +) decays

  • Author(s): Aaij, R
  • Adeva, B
  • Adinolfi, M
  • Ajaltouni, Z
  • Akar, S
  • Albrecht, J
  • Alessio, F
  • Alexander, M
  • Alfonso Albero, A
  • Ali, S
  • Alkhazov, G
  • Alvarez Cartelle, P
  • Alves, AA
  • Amato, S
  • Amerio, S
  • Amhis, Y
  • An, L
  • Anderlini, L
  • Andreassi, G
  • Andreotti, M
  • Andrews, JE
  • Appleby, RB
  • Archilli, F
  • d’Argent, P
  • Arnau Romeu, J
  • Artamonov, A
  • Artuso, M
  • Aslanides, E
  • Atzeni, M
  • Auriemma, G
  • Baalouch, M
  • Babuschkin, I
  • Bachmann, S
  • Back, JJ
  • Badalov, A
  • Baesso, C
  • Baker, S
  • Balagura, V
  • Baldini, W
  • Baranov, A
  • Barlow, RJ
  • Barschel, C
  • Barsuk, S
  • Barter, W
  • Baryshnikov, F
  • Batozskaya, V
  • Battista, V
  • Bay, A
  • Beaucourt, L
  • Beddow, J
  • Bedeschi, F
  • Bediaga, I
  • Beiter, A
  • Bel, LJ
  • Beliy, N
  • Bellee, V
  • Belloli, N
  • Belous, K
  • Belyaev, I
  • Ben-Haim, E
  • Bencivenni, G
  • Benson, S
  • Beranek, S
  • Berezhnoy, A
  • Bernet, R
  • Berninghoff, D
  • Bertholet, E
  • Bertolin, A
  • Betancourt, C
  • Betti, F
  • Bettler, MO
  • van Beuzekom, M
  • Bezshyiko, I
  • Bifani, S
  • Billoir, P
  • Birnkraut, A
  • Bizzeti, A
  • Bjørn, M
  • Blake, T
  • Blanc, F
  • Blusk, S
  • Bocci, V
  • Boettcher, T
  • Bondar, A
  • Bondar, N
  • Bordyuzhin, I
  • Borghi, S
  • Borisyak, M
  • Borsato, M
  • Bossu, F
  • Boubdir, M
  • Bowcock, TJV
  • Bowen, E
  • Bozzi, C
  • Braun, S
  • Brodzicka, J
  • Brundu, D
  • Buchanan, E
  • Burr, C
  • Bursche, A
  • et al.

Published Web Location

http://doi.org/10.1007/JHEP03(2018)140
No data is associated with this publication.
Abstract

A flavour-tagged decay-time-dependent amplitude analysis of Bs0 → (K+π−)(K−π+) decays is presented in the K±π∓ mass range from 750 to 1600MeV/c2. The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb−1. Several quasi-two-body decay modes are considered, corresponding to K±π∓ combinations with spin 0, 1 and 2, which are dominated by the K0*(800)0 and K0*(1430)0, the K*(892)0 and the K2*(1430)0 resonances, respectively. The longitudinal polarisation fraction for the Bs0→K∗(892)°K¯∗(892)0 decay is measured as fL = 0.208 ± 0.032 ± 0.046, where the first uncertainty is statistical and the second is systematic. The first measurement of the mixing-induced CP-violating phase, ϕsdd¯, in b→ dd¯ s transitions is performed, yielding a value of ϕsdd¯=−0.10±0.13(stat)±0.14 (syst) rad.

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