Measurements of A b, R b and the B±,0 lifetimes at the Z0 resonance by SLD

Abstract

R b , A b and the lifetimes of the B + ( B u ) and B 0 ( B d ) mesons have been measured using a sample of 150,000 hadronic Z 0 decays collected by the SLD experiment at the SLC between 1993 and 1995. The analyses make use of a novel topological vertexing technique to obtain charge, decay length and vertex mass. The asymmetry A b is measured with a self-calibrating technique employing momentum-weighted track charge from both hemispheres in the tagged events as well as by using the polar angle dependency of the Z 0 — pole polarized cross section and tagging the bottom and charmed hadrons in the semileptonic decay channel.