F. Abe et al., MEASUREMENT OF THE B-0-(B)OVER-BAR(0) OSCILLATION FREQUENCY USING PI-B MESON CHARGE-FLAVOR CORRELATIONS IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEV, Physical review letters, 80(10), 1998, pp. 2057-2062
We present a measurement of the B-0 <-> (B) over bar(0) oscillation fr
equency a flavor tagging method based on correlations of B meson flavo
r with the charge of other particles produced in <p(p)over bar> collis
ions at root s = 1.8 TeV. Such correlations are expected to arise from
b quark hadronization and from B* decays. We partially reconstruct B
mesons using the semileptonic decays B-0 --> l(+) D-(-)X and B+ -->
l(+)(D) over bar(0)X. From the oscillation frequency, we obtain the ma
ss difference between the two B-0 mass eigenstates, Delta m(d) = 0.471
(+0.068)(+0.078)(stat) +/- 0.034(syst)(h) over bar ps(-1), and measure
the efficiency and purity of this flavor tagging method for both char
ged and neutral B mesons.