Measurement of sin2 from BJ/KS0 with the CDF detector Academic Article uri icon


  • This paper reports an updated measurement of the standard model CP violation parameter sin 2 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 BJ/KS0 events, where J/+- and KS0 +-. 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 sin2=0.19-0.44+0.41(stat+syst). This value of sin 2 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.

published proceedings

  • Physical Review D - Particles, Fields, Gravitation and Cosmology

author list (cited authors)

  • Affolder, T., Akimoto, H., Akopian, A., Albrow, M. G., Amaral, P., Amendolia, S. R., ... Dejongh, F.

complete list of 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

publication date

  • April 2000