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Model-independent measurement of the CKM angle γ using B0→ DK∗0decays with D → KS0π+πand KS0K+K

  • Author(s): The LHCb collaboration
  • Aaij, R
  • Abellán Beteta, C
  • Adeva, B
  • Adinolfi, M
  • Ajaltouni, Z
  • Akar, S
  • Albrecht, J
  • Alessio, F
  • Alexander, M
  • 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
  • Aquines Gutierrez, O
  • Archilli, F
  • d’Argent, P
  • Artamonov, A
  • Artuso, M
  • Aslanides, E
  • Auriemma, G
  • Baalouch, M
  • Bachmann, S
  • Back, JJ
  • Badalov, A
  • Baesso, C
  • Baker, S
  • Baldini, W
  • Barlow, RJ
  • Barschel, C
  • Barsuk, S
  • Barter, W
  • Batozskaya, V
  • Battista, V
  • Bay, A
  • Beaucourt, L
  • Beddow, J
  • Bedeschi, F
  • Bediaga, I
  • Bel, LJ
  • Bellee, V
  • Belloli, N
  • Belyaev, I
  • Ben-Haim, E
  • Bencivenni, G
  • Benson, S
  • Benton, J
  • Berezhnoy, A
  • Bernet, R
  • Bertolin, A
  • Betti, F
  • Bettler, MO
  • van Beuzekom, M
  • Bifani, S
  • Billoir, P
  • Bird, T
  • Birnkraut, A
  • Bizzeti, A
  • Blake, T
  • Blanc, F
  • Blouw, J
  • Blusk, S
  • Bocci, V
  • Bondar, A
  • Bondar, N
  • Bonivento, W
  • Borgheresi, A
  • Borghi, S
  • Borisyak, M
  • Borsato, M
  • Boubdir, M
  • Bowcock, TJV
  • Bowen, E
  • Bozzi, C
  • Braun, S
  • Britsch, M
  • Britton, T
  • Brodzicka, J
  • Buchanan, E
  • Burr, C
  • Bursche, A
  • Buytaert, J
  • Cadeddu, S
  • et al.

Published Web Location

http://doi.org/10.1007/JHEP06(2016)131
No data is associated with this publication.
Abstract

© 2016, The Author(s). A binned Dalitz plot analysis of the decays B0→ DK∗0, with D → KS0π+π−and D → KS0K+K−, is performed to measure the observables x±and y±, which are related to the CKM angle γ and the hadronic parameters of the decays. The D decay strong phase variation over the Dalitz plot is taken from measurements performed at the CLEO-c experiment, making the analysis independent of the D decay model. With a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment, the values of the CP violation parameters are found to be x+= 0.05 ± 0.35 ± 0.02, x−= −0.31 ± 0.20 ± 0.04, y+= −0.81 ± 0.28 ± 0.06 and y−= 0.31 ± 0.21 ± 0.05, where the first uncertainties are statistical and the second systematic. These observables correspond to values γ = (71 ± 20)°, rB0=0.56±0.17 and δB0=(204−20+21)°. The parameters rB0 and δB0 are the magnitude ratio and strong phase difference between the suppressed and favoured B0decay amplitudes, and have been measured in a region of ±50 MeV/c2around the K∗(892)0mass and with the magnitude of the cosine of the K∗(892)0helicity angle larger than 0.4.

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