Measurements of time-dependent CP asymmetries in B -> D * -/+pi(+/-) decays using a partial reconstruction technique

Abstract

We report results on time-dependent CP asymmetries in B D decays based on a data sample containing 657 106 B B pairs collected with the Belle detector at the KEKB asymmetric-energy ee collider at the S resonance. We use a partial reconstruction technique, wherein signal B D events are identified using information only from the fast pion from the B decay and the slow pion from the subsequent decay of the D