Direct CP-violation as a test of quantum mechanics

Direct Cp-violation as a Test of Quantum Mechanics

Direct CP -violating effects in the neutral kaon system result in violations of certain Bell-like inequalities. The new experimental results on the determination of the phenomenological parameter ε′ allow to dismiss a large class of “hidden variable” alternatives to quantum mechanics.

CP Violation and Quantum Mechanics in the B System 1

We discuss the testing of the Standard Model of CP violation, and the search for CPviolating effects from beyond the Standard Model, in B decays. We then focus on the quantum mechanics of the experiments on CP violation to be performed at B factories. These experiments will involve very pretty Einstein-Podolsky-Rosen correlations. We show that the physics of these experiments can be understood ...

CP Asymmetries in b → ( s / d ) Transitions as a Test of CKM CP Violation

We point out that a simple test of the mechanism of CP violation can be performed by a measurement of the CP asymmetries in exclusive and inclusive radiative rare decays. We show that the rate asymmetries ∆Γ = Γ(B → fγ)− Γ(B+ → f̄γ) for certain final states f can be predicted in a theoretically clean way. Some implications for b → sl+l− decays are discussed.

New Measurements of Direct Cp Violation

Measurement of Direct Cp Violation by Na48

The NA48 experiment at the CERN SPS aims to search for direct CP /violation in the K system through the measurement of Re(ε/ε) with high accuracy. In 1999 the NA48 collaboration has published its first measurement based on 1997 data. The final result based on 1998 and 1999 data is presented in this article. The result, combined with 1997 data, Re(ε/ε) = (15.3 ± 2.6) × 10, definitely established...