Skip to main content
eScholarship
Open Access Publications from the University of California

Measurement of CP asymmetry in Bs0 → Ds K ± 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
  • et al.
Abstract

© 2018, The Author(s). We report the measurements of the CP -violating parameters in Bs0 → Ds∓K± decays observed in pp collisions, using a data set corresponding to an integrated luminosity of 3.0 fb−1 recorded with the LHCb detector. We measure Cf = 0.73 ± 0.14 ± 0.05, AfΔΓ = 0.39 ± 0.28 ± 0.15, Af=0.31±0.28±0.15, Sf = −0.52 ± 0.20 ± 0.07, Sf¯= − 0.49 ± 0.20 ± 0.07 , where the uncertainties are statistical and systematic, respectively. These parameters are used together with the world-average value of the Bs0 mixing phase, −2βs, to obtain a measurement of the CKM angle γ from Bs0 → Ds∓K± decays, yielding γ = (128− 22+ 17)° modulo 180°, where the uncertainty contains both statistical and systematic contributions. This corresponds to 3.8 σ evidence for CP violation in the interference between decay and decay after mixing.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View