Measurement of the B0-B̄0 oscillation frequency using π-B meson charge-flavor correlations in pp̄ collisions at √s= 1.8 TeV

We present a measurement of the B{sup 0}{leftrightarrow}{ovr B}{sup 0} 0 oscillation frequency using a flavor tagging method based on correlations of B meson flavor with the charge of other particles produced in p{ovr p} collisions at sqrt[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{sup 0}{yields}l{sup +}D{sup (*)-}X and B{sup +}{yields}l{sup +}{ovr D}{sup 0}X. From the oscillation frequency, we obtain the mass difference between the two B{sup 0} mass eigenstates, {Delta}m{sub d} = 0.471{sub -0.068}{sup +0.078}(stat){+-}0.034(syst){Dirac_h} ps{sup -1}, and measure the efficiency and purity of this flavor tagging method for both charged and neutral B mesons.