Measurement of B0-B0 flavor oscillations using jet-charge and lepton flavor tagging in pp collisions at s=1.8 TeV
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We present a measurement of the mass difference md for the B0 meson and the statistical power of the b flavor tagging methods used. The measurement uses 90 pb-1 of data from pp collisions at s= 1.8 TeV collected with the CDF detector. An inclusive lepton trigger is used to collect a large sample of B hadron semileptonic decays. The mass difference md is determined from the proper time dependence of the fraction of B hadrons that undergo flavor oscillations. The flavor at decay is inferred from the charge of the lepton from semileptonic B decay. The initial flavor is inferred by determining the flavor of the other B hadron produced in the collision, either from its semileptonic decay (soft-lepton tag) or from its jet charge. The measurement yields md=(0.5000.0520.043) ps-1, where the first uncertainty is statistical and the second uncertainty is systematic. The statistical powers (D2) of the soft-lepton and jet-charge flavor taggers are (0.910.10 0.11)% and (0.780.120.08)%, respectively. 1999 The American Physical Society.