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Measurement of the charge asymmetry in semileptonic Bs0 decays

  • V. M. Abazov
  • , B. Abbott
  • , M. Abolins
  • , B. S. Acharya
  • , M. Adams
  • , T. Adams
  • , E. Aguilo
  • , S. H. Ahn
  • , M. Ahsan
  • , G. D. Alexeev
  • , G. Alkhazov
  • , A. Alton
  • , G. Alverson
  • , G. A. Alves
  • , M. Anastasoaie
  • , L. S. Ancu
  • , T. Andeen
  • , S. Anderson
  • , B. Andrieu
  • , M. S. Anzelc
  • Y. Arnoud, M. Arov, A. Askew, B. Åsman, A. C.S. Assis Jesus, O. Atramentov, C. Autermann, C. Avila, C. Ay, F. Badaud, A. Baden, L. Bagby, B. Baldin, D. V. Bandurin, P. Banerjee, S. Banerjee, E. Barberis, P. Bargassa, P. Baringer, C. Barnes, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, S. Beale, A. Bean, M. Begalli, M. Begel, C. Belanger-Champagne, L. Bellantoni, A. Bellavance, J. A. Benitez, S. B. Beri, G. Bernardi, R. Bernhard, L. Berntzon, I. Bertram, M. Besançon, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, M. Binder, C. Biscarat, I. Blackler, G. Blazey, F. Blekman, S. Blessing, D. Bloch, K. Bloom, A. Boehnlein, D. Boline, T. A. Bolton, G. Borissov, K. Bos, T. Bose, A. Brandt, R. Brock, G. Brooijmans, A. Bross, D. Brown, N. J. Buchanan, D. Buchholz, M. Buehler, V. Buescher, S. Burdin, S. Burke, T. H. Burnett, E. Busato, C. P. Buszello, J. M. Butler, P. Calfayan, S. Calvet, J. Cammin, S. Caron, W. Carvalho, B. C.K. Casey, N. M. Cason, H. Castilla-Valdez, S. 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Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We have performed the first direct measurement of the time-integrated flavor untagged charge asymmetry in semileptonic Bs0 decays ASLs,unt by comparing the decay rate of Bs0→μ+Ds-νX, where Ds- π- and →K+K-, with the charge-conjugate B̄s0 decay rate. This sample was selected from 1.3fb-1 of data collected by the D0 experiment in run II of the Fermilab Tevatron collider. We obtain ASLs,unt=[1.23±0.97(stat)±0. 17(syst)]×10-2. Assuming that Δms/Γ̄s 1, this result can be translated into a measurement of the CP-violating phase in Bs0 mixing: ΔΓs/Δmstan s=[2.45±1.93(stat)±0.35(syst)] ×10-2.

Original languageEnglish
Article number151801
JournalPhysical Review Letters
Volume98
Issue number15
DOIs
StatePublished - Apr 11 2007

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