Testing Time-Reversal : $\Lambda_b$ Decays into Polarized Resonances

Ziad Zj Ajaltouni (1) , E Di Salvo , O. Leitner

1 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

Weak decays of beauty baryons like Lambda_b into Lambda V(J^P=1^-), where the produced resonances are polarized, offer interesting opportunity to perform tests of Time-Reversal Invariance. This paper emphasizes the particular role of the resonance polarization-vectors and their physical properties by symmetry transformations. In particular, it is shown that the normal component of a polarization-vector, as defined in the Jackson's frame, is Lorentz invariant and could get large values, notably in the case of J/psi production.

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Ziad Zj Ajaltouni, E Di Salvo, O. Leitner. Testing Time-Reversal : $\Lambda_b$ Decays into Polarized Resonances. 2007. ⟨in2p3-00134091⟩