Model-independent measurement of the CKM angle γ using B<sup>0</sup> → DK<sup>∗0</sup> decays with D → K <inf>S</inf><sup>0</sup> π <sup>+</sup> π <sup>−</sup> and K <inf>S</inf><sup>0</sup> K<sup>+</sup>K<sup>−</sup>

The LHCb collaboration, R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. AndreassiM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, P. d’Argent, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, S. Baker, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, L. J. Bel, V. Bellee, N. Belloli, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin, F. Betti, M. O. Bettler, M. van Beuzekom, S. Bifani, P. Billoir, T. Bird, A. Birnkraut, A. Bizzeti, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, A. Borgheresi, S. Borghi, M. Borisyak, M. Borsato, M. Boubdir, T. J.V. Bowcock, E. Bowen, C. Bozzi, S. Braun, M. Britsch, T. Britton, J. Brodzicka, E. Buchanan, C. Burr, A. Bursche, J. Buytaert, S. Cadeddu

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Resumen

A binned Dalitz plot analysis of the decays B 0 → DK ∗0, with D → K S 0π +π and D → K S 0K +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 B 0 decay amplitudes, and have been measured in a region of ±50 MeV/c 2 around the K (892) 0 mass and with the magnitude of the cosine of the K (892) 0 helicity angle larger than 0.4.

Idioma originalEnglish
Número de artículo131
PublicaciónJournal of High Energy Physics
Volumen2016
N.º6
DOI
EstadoPublished - 1 jun 2016
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Física nuclear y de alta energía

Huella

Profundice en los temas de investigación de 'Model-independent measurement of the CKM angle γ using B<sup>0</sup> → DK<sup>∗0</sup> decays with D → K <inf>S</inf><sup>0</sup> π <sup>+</sup> π <sup>−</sup> and K <inf>S</inf><sup>0</sup> K<sup>+</sup>K<sup>−</sup>'. En conjunto forman una huella única.

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