Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Charmless B decays and CP violation at BABAR

Jul 7, 2012, 5:15 PM
Room 220 (Melbourne Convention and Exhibition Centre)

Room 220

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy Room 220 Lattice QCD / B-Physics / CP Violation, etc -TR5&7&10


Dr Eli Ben Haim (LPNHE, IN2P3-CNRS, Universities of Paris VI (FR))


We report a measurement of CP violation in the decay B0 --> pi+ pi- pi0 using the full Upsilon(4S) sample of the BABAR experiment. We perform a full time-dependent Dalitz-plot analysis sensitivity to the interference between B0 and B0bar decays, as well as between the intermediate rho --> pi pi resonances. This allows us to extract the CKM unitarity-triangle angle alpha with reduced ambiguity and improved precision. Precise measurement of alpha serves to test the standard model and constrain new physics in B0-B0bar mixing. We search for decays of the B0 meson to the final states omega omega and omega phi. These flavor-changing-neutral-current decays are sensitive to physics beyond the standard model and thus provide constraints on potential new-physics effects. They may also shed light on the unexpectedly low longitudinal-polarization fraction in the SU(3)-related decay B-->K* phi. We report studies of B-meson decays to the K* rho and K*f0 final states, where the K* and rho may be charged or neutral. We distinguish between the vector K*(892), the tensor K*_2(1430), and the resonant and nonresonant scalar components. We report first observation or first evidence for some of the modes and analyze the polarization of the vector-vector and vector-tensor components for the observed signals.

Primary author

Dr Eli Ben Haim (LPNHE, IN2P3-CNRS, Universities of Paris VI (FR))

Presentation materials