CP violation studies in B 0 → D (*)± π ∓ in BaBar and Belle

Dominique Boutigny

doi:10.1140/epjcd/s2004-03-1643-1

EPJ

CP violation studies in B ⁰ → D ^(*)± π ^∓ in BaBar and Belle

Dominique Boutigny

Laboratoire d’Annecy-le-Vieux de Physique des Particules CNRS/IN2P3 – BP 110 F-74941 Annecy-le-Vieux CEDEX, France

Received: 18 September 2003
Accepted: 6 January 2004
Published online: 6 February 2004

Abstract

We present a preliminary measurement of the time-dependent CP asymmetries in decays of B ⁰ mesons to the final states D ^(*) π using data collected by the BaBar experiment at the PEP-II storage rings. B mesons decaying to D π are fully reconstructed, while events containing B → D ^(*) π are selected using a full or a partial reconstruction technique. These results can be interpreted in terms of a constraint on the angles of the unitarity triangle to set a lower bound on

. The Belle experiment at the KEK-B collider is performing the same kind of studies and a preliminary estimation of the achievable error is presented.