Measurement of sin 2β from B→J/φK s0 with the CDF detector

Published

Journal Article

This paper reports an updated measurement of the standard model CP violation parameter sin 2β using the CDF Detector at Fermilab. The entire run I data sample of 110 pb -1 of proton-antiproton collisions at √s = 1.8 TeV is used to identify a signal sample of ∼400 B→J/φK s0 events, where J/φ→μ + μ - →μ + μ - . The flavor of the neutral B meson is identified at the time of production by combining information from three tagging algorithms: a same-side tag, a jet-charge tag, and a soft-lepton tag. A maximum likelihood fitting method is used to determine sin 2β=0.79 -0.44+0.41 (stat+syst). This value of sin 2β is consistent with the standard model prediction, based upon existing measurements, of a large positive CP-violating asymmetry in this decay mode. ©2000 The American Physical Society.

Duke Authors

Cited Authors

  • Affolder, T; Akimoto, H; Akopian, A; Albrow, MG; Amaral, P; Amendolia, SR; Amidei, D; Antos, J; Apollinari, G; Arisawa, T; Asakawa, T; Ashmanskas, W; Atac, M; Azzi-Bacchetta, P; Bacchetta, N; Bailey, MW; Bailey, S; de Barbaro, P; Barbaro-Galtieri, A; Barnes, VE; Barnett, BA; Barone, M; Bauer, G; Bedeschi, F; Belforte, S; Bellettini, G; Bellinger, J; Benjamin, D; Bensinger, J; Beretvas, A; Berge, JP; Berryhill, J; Bertolucci, S; Bevensee, B; Bhatti, A; Bigongiari, C; Binkley, M; Bisello, D; Blair, RE; Blocker, C; Bloom, K; Blumenfeld, B; Blusk, BS; Bocci, A; Bodek, A; Bokhari, W; Bolla, G; Bonushkin, Y; Bortoletto, D; Boudreau, J; Brandl, A; van den Brink, S; Bromberg, C; Bruner, N; Buckley-Geer, E; Budagov, J; Budd, HS; Burkett, K; Busetto, G; Byon-Wagner, A; Byrum, KL; Campbell, M; Caner, A; Carithers, W; Carlson, J; Carlsmith, D; Cassada, J; Castro, A; Cauz, D; Cerri, A; Chang, PS; Chang, PT; Chapman, J; Chen, C; Chen, YC; Cheng, MT; Chertok, M; Chiarelli, G; Chirikov-Zorin, I; Chlachidze, G; Chlebana, F; Christofek, L; Chu, ML; Cihangir, S; Ciobanu, CI; Clark, AG; Cobal, M; Cocca, E; Connolly, A; Conway, J; Cooper, J; Cordelli, M; Guimaraes da Costa, J; Costanzo, D; Cranshaw, J; Cronin-Hennessy, D; Cropp, R; Culbertson, R; Dagenhart, D; DeJongh, F

Published Date

  • December 1, 2000

Published In

Volume / Issue

  • 61 / 7

International Standard Serial Number (ISSN)

  • 0556-2821

Citation Source

  • Scopus