Separate T, CP, CPT Asymmetries in Neutral Meson Transitions

Symmetries, and symmetry breakings, in the laws of physics play a crucial role in fundamental science. Parity and charge conjugation violations prompted the consideration of chiral fields in the construction of the Standard Model, whereas CP-violation needed at least three families of quarks leading to flavour physics. In this lecture I will discuss the conceptual basis and the present experimental results for a direct evidence of separate reversal-in-time T, CP and CPT genuine asymmetries in decaying particles like neutral meson transitions, using quantum entanglement and the decay as a filtering measurement. The eight transitions associated to the flavour-CP eigenstate decay products of entangled neutral mesons have demonstrated with impressive significance a separate evidence of TRV and CPV in B-d-physics, whereas a CPTV asymmetry shows a 2-sigma effect interpreted as an upper limit. Novel CPTV observables are discussed for K and B-d transitions. Their observation would lead to a change of paradigm beyond quantum field theory, however there is nothing in quantum mechanics forbidding CPTV. A clean methodology to disentangle CPTV effects in the Hamiltonian dynamics and the omega-effect weakening entanglement in a given experiment is discussed.