MODEL-INDEPENDENT TESTS FOR TIME REVERSAL, CP VIOLATIONS AND FOR CPT THEOREM IN Λb AND $\bar\Lambda_b$ TWO-BODY DECAYS

Abstract

Weak decays of beauty baryons like [Formula: see text] into [Formula: see text] and V(JP = 1-), where both decay products are polarized, offer interesting opportunities to perform tests of time reversal, CP violations and of CPT invariance. We propose a model-independent parametrization, via spin density matrix, of the angular distribution, of the polarizations and of some polarization correlations of the decay products. The transverse component of the polarization and two polarization correlations are sensitive to time reversal violations. Moreover several CP- and CPT-odd observables are singled out.