Testing CP and Time reversal Symmetries with Lambda_b to Lambda V(-1) decays

jeudi 19 oct. 2006, 16:30 → 17:30 Europe/Paris

LPNHE, 4 place Jussieu, T33-34, Salle Grossetete

Didier Lacour

Seminaire du LPNHE

16:30 → 17:25 <b>Seminaire</b><br> Testing CP and Time reversal Symmetries with Lambda_b to Lambda V(-1) decays

Putting together kinematical and dynamical analysis, a complete study of the decay channels Lambda_b to Lambda V(-1) with Lambda to p pi- and V(J/Psy) to l+ l- or V(rho0) to pi+ pi- is presented. An intensive use of the helicity formalism is involved on the kinematical side, while on the dynamical side, HQET is applied to determine the hadronic matrix elements between the baryons Lambda_b and Lambda. CP and time reversal symmetries are investigated in these channels where the major role of the Lambda_b polarization for constructing T-odd observables is emphasized.

Orateur: Olivier Leitner (LPNHE)