1305.1575 (M. Margoni et al.)

Search for CP Violation in B0B0bar Mixing using Partial Reconstruction
of B0-->D*-Xl+ nu and a Kaon Tag    [PDF]

M. Margoni, F. Simonetto, others. The BABAR Collaboration

We present results of a search for CP violation in B0B0bar mixing with the BABAR detector. We select a sample of B0-->D*-Xl+ nu decays with a partial reconstruction method and use kaon tagging to assess the flavor of the other B meson in the event. We determine the CP violating asymmetry ACP = (N(B0B0) - N(B0bar B0bar))/(N(B0B0) + N(B0bar B0bar))=(0.06+-0.17+0.38-0.32)%, corresponding to delta_CP =1 - |q/p| =(0.29+-0.84+1.88 -1.61)*10^-3.

View original: http://arxiv.org/abs/1305.1575