T. Affolder et al., Measurement of the B-0(B)over-bar-(0) oscillation frequency using l(-)D *(+) pairs and lepton flavor tags - art. no. 112004, PHYS REV D, 6011(11), 1999, pp. 2004
The oscillation frequency Delta m(d) of B-0(B) over bar(0) mixing is measur
ed using the partially reconstructed semileptonic decay (B) over bar(0) -->
l(-) <(nu)over bar>D*(+) X. The data sample was collected with the CDF det
ector at the Fermilab Tevatron collider during 1992-1995 by triggering on t
he existence of two lepton candidates in an event, and corresponds to about
110 pb(-1) of (p) over bar p collisions at root s = 1.8 TeV. We estimate t
he proper decay time of the (B) over bar(0) meson from the measured decay l
ength and reconstructed momentum of the l(-) D*(+) system. The charge of th
e lepton in the final state identifies the flavor of the (B) over bar(0) me
son at its decay. The second lepton in the event is used to infer the flavo
r of the (B) over bar(0) meson at production. We measure the oscillation fr
equency to be Delta m(d)=0.516 +/- 0.099(-0.035)(+0.029) ps(-1), where the
first uncertainty is statistical and the second is systematic. [S0556-2821(
99)04623-8].