Recent results published in Nature Physics (2019) by the BESIII collaboration revealed a substantial discrepancy of the Lambda baryon decay parameter with respect to the world average at the time.
We took this development as the starting point for a feasibility study of CP violation tests in strange baryon decays at next generation J/ψ factories. The proposed formalism allows for a direct comparison of particle and antiparticle properties, analyzing the weight of spin-correlation and polarization terms on such tests.
The same weak non-leptonic decays can be studied using chiral perturbation theory (χPT), where S- and P-wave amplitudes are computed up to one-loop corrections. We investigate the behavior of such spherical waves in the light of the recent experimental updates and in a fully relativistic framework.