Evidence for bso→ decay and measurements of branching ratio and ACP for B+→K+

D. Acosta, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, D. Ambrose, S. Amerio, D. Amidei, A. Anastassov, K. Anikeev, A. Annovi, J. Antos, M. Aoki, G. Apollinari, T. Arisawa, J. F. Arguin, A. Artikov, W. Ashmanskas, A. Attal, F. AzfarP. Azzi-Bacchetta, N. Bacchetta, H. Bachacou, W. Badgett, A. Barbaro-Galtieri, G. J. Barker, V. E. Barnes, B. A. Barnett, S. Baroiant, G. Bauer, F. Bedeschi, S. Behari, S. Belforte, G. Bellettini, J. Bellinger, A. Belloni, E. Ben-Haim, D. Benjamin, A. Beretvas, A. Bhatti, M. Binkley, D. Bisello, M. Bishai, R. E. Blair, C. Blocker, K. Bloom, B. Blumenfeld, A. Bocci, A. Bodek, G. Bolla, A. Bolshov, D. Bortoletto, J. Boudreau, S. Bourov, B. Brau, C. Bromberg, E. Brubaker, J. Budagov, H. S. Budd, K. Burkett, G. Busetto, P. Bussey, K. L. Byrum, S. Cabrera, M. Campanelli, M. Campbell, F. Canelli, A. Canepa, M. Casarsa, S. Castellano, D. Carlsmith, R. Carosi, S. Carron, M. Cavalli-Sforza, A. Castro, P. Catastini, D. Cauz, A. Cerri, L. Cerrito, J. Chapman, Y. C. Chen, M. Chertok, G. Chiarelli, G. Chlachidze, F. Chlebana, I. Cho, K. Cho, D. Chokheli, J. P. Chou, S. Chuang, K. Chung, W. H. Chung, Y. S. Chung, M. Cijliak, C. I. Ciobanu, M. A. Ciocci, A. G. Clark, D. Clark, M. Coca

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Abstract

We present the first evidence of charmless decays of the Bs0 meson, the decay Bso→, and a measurement of the branching ratio BR(Bs0→) using 180pb-1 of data collected by the CDFII experiment at the Fermilab Tevatron collider. In addition, the BR and direct CP asymmetry for the B+→K+ decay are measured. We obtain BR(Bs0→)=[14-5+6(stat)±6(syst)]×10-6, BR(B+→K+)=[7.6±1.3(stat)±0.6(syst)]×10-6, and ACP(B+→K+)=-0.07±0.17(stat)+0.03-0.02(syst). Both decays are governed in the standard model by second order (penguin) b→ss̄s amplitudes.

Original languageEnglish
Article number031801
JournalPhysical Review Letters
Volume95
Issue number3
DOIs
Publication statusPublished - 2005 Jul 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Acosta, D., Adelman, J., Affolder, T., Akimoto, T., Albrow, M. G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., Annovi, A., Antos, J., Aoki, M., Apollinari, G., Arisawa, T., Arguin, J. F., Artikov, A., Ashmanskas, W., Attal, A., ... Coca, M. (2005). Evidence for bso→ decay and measurements of branching ratio and ACP for B+→K+. Physical Review Letters, 95(3), [031801]. https://doi.org/10.1103/PhysRevLett.95.031801