F. Abe et al., Measurement of the CP-violation parameter sin(2 beta) in B-d(0)/(B)over-bar(d)(0)-> J/psi K-S(0) decays, PHYS REV L, 81(25), 1998, pp. 5513-5518
We present a measurement of the time-dependent asymmetry in the rate for (B
)over-bar(d)(0) versus B-d(0) decays to J/psi K-S(0). A nonzero asymmetry w
ould be an indication of CP violation, and within the standard model this m
ay be used to measure the CP-violation parameter sin(2 beta). A total of 19
8 +/- 17 B-d(0)/(B)over-bar(d)(0) decays were observed in p(p)over-bar coll
isions at root s = 1.8 TeV by the CDF detector at the Fermilab Tevatron. B-
d(0) and (B)over-bar(d)(0) are distinguished by a technique based on charge
correlations from hadronization of the b quark. Our analysis results in si
n(2 beta) = 1.8 +/- 1.1 (stat) +/- 0.3(syst).