CP, T and CPT versus temporal asymmetries for entangled states of the Bd-system

Abstract

The observables used in the K-system to characterize T and CPT violation are no longer useful for the Bd-system, since the width difference ΔΓbetween the physical states is vanishingly small. We show that only Im(ε) and Re(δ) can survive if ΔΓ = 0, and build alternative CP-odd, CPT-odd, T-odd and temporal asymmetries for the B±→ B0,B̄0 transitions. These quantities enable us to test T and CPT invariances of the effective Hamiltonian for the B-system. The method needs the CP eigenstates B±, which can be tagged unambiguously to θ(λ3) from the entangled states of a B-factory. © 1999 Published by Elsevier Science B.V. All rights reserved.