Abstract
CP-Violation (CPV) was discovered in 1964 in the weak decays of neutral Kaons. This Symmetry Breaking is understood in the Standard Model as a consequence of its Particle Content, codified in the 3×3 Cabibbo-Kobayashi-Maskawa Unitary Mixing Matrix. The measured CPV asymmetries for Kaons and B's are well described by this Mechanism, but the current level of experimental accuracy and theoretical uncertainties leaves room for additional sources of CPV, as demanded by Baryogenesis. A direct Time-Reversal-Violation (TRV) Effect was clearly observed in 2012 in the time evolution of neutral B-mesons. The conceptual basis to bypass the irreversibility of decays, and prepare in the B-Factories both the Reference and the T-reverse transitions, is provided by the quantum properties of Entanglement and the Decay as a Filtering Measurement. Flavour and CP eigenstate decay channels allow a separate independent measurement of CP, T and CPT asymmetries. Prospects for extending such a programmeto any pair of B-decays and for Kaonsin DAPHNE are discussed. The interest in measuring CPTV asymmetries in transitions is emphasized. This includes the search for CPT-breaking as well as the case of not having a well-defined CPT operator.
Highlights
Symmetries have been an essential ingredient in the understanding of the physical laws of Nature.The assumption of the form invariance of the dynamical equations under a symmetry transformation of the physical magnitudes leads to observable consequences, with regularities, conservation laws and invariant observables that act as guiding components for the dynamics
Symmetry Breaking through a definite mechanism is a source of new phenomena and new physics
We identify potential transitions in B-physics, using Flavour-Changing-Neutral-Current (FCNC) processes and CPV asymmetries, able to incorporate virtual contributions of New Physics
Summary
Symmetries have been an essential ingredient in the understanding of the physical laws of Nature.The assumption of the form invariance of the dynamical equations under a symmetry transformation of the physical magnitudes leads to observable consequences, with regularities, conservation laws and invariant observables that act as guiding components for the dynamics. Symmetry Breaking through a definite mechanism is a source of new phenomena and new physics. In this talk I will concentrate on the Discrete Symmetries CP, T and CPT. We distinguish explicit CPT symmetry breaking mechanisms from physical scenarios in which the CPT-operator implementing the symmetry is ill-defined. For entangled systems this second alternative leads to the ω-effect, a component of the wrong symmetry in the coherent state of neutral mesons.
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