Measurement of cp violation in the phase space of B ±→K±π+π- and B±→K±K+K- Decays

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. Andreassen, J. E. AndrewsR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, I. Burducea, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, D. Campora Perez, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, H. Carranza-Mejia, L. Carson, K. Carvalho Akiba, G. Casse

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)

Abstract

The charmless decays B ±→K ±π +π - and B ±→K ±K +K - are reconstructed using data, corresponding to an integrated luminosity of 1.0 fb -1, collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured as A CP(B ±→K ±π +π -)=0.032±0.008 (stat)±0.004 (syst)±0.007(J/ψK ±) and A CP(B ±→K ±K +K -)=-0. 043±0.009 (stat)±0.003 (syst)±0.007(J/ψK ±), where the third uncertainty is due to the CP asymmetry of the B ±→J/ψK ± reference mode. The significance of A CP(B ±→K ±K +K -) exceeds three standard deviations and is the first evidence of an inclusive CP asymmetry in charmless three-body B decays. In addition to the inclusive CP asymmetries, larger asymmetries are observed in localized regions of phase space.

Original languageEnglish
Article number101801
JournalPhysical Review Letters
Volume111
Issue number10
DOIs
Publication statusPublished - 3 Sep 2013
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Measurement of cp violation in the phase space of B <sup>±</sup>→K<sup>±</sup>π<sup>+</sup>π<sup>-</sup> and B<sup>±</sup>→K<sup>±</sup>K<sup>+</sup>K<sup>-</sup> Decays'. Together they form a unique fingerprint.

Cite this