Strangeness Measurements of Kaon Pairs, Cp Violation and Bell Inequalities
نویسنده
چکیده
The nonlocal property of quantum mechanics can be nicely tested in high energy physics; in particular, the neutral kaon pairs as produced at DAΦNE, Frascati, are very well suited. The analogies of kaons as compared to polarized photons or spin– 1 2 particles —the kaonic qubit feature— are reviewed. However, there are also fundamental differences which occur due to the kaon time evolution and due to internal symmetries; in particular, the violation of CP symmetry is related to the violation of Bell inequalities. Two type of Bell inequalities for kaons are presented, one for the variation of the “quasi–spin” and the other for different detection times of the kaon.
منابع مشابه
Bell inequalities for entangled kaons and their unitary time evolution
We investigate Bell inequalities for neutral kaon systems from Φ resonance decay to test local realism versus quantum mechanics. We emphasize the unitary time evolution of the states, that means we also include all decay product states, in contrast to other authors. Only this guarantees the use of the complete Hilbert space. We develop a general formalism for Bell inequalities including both ar...
متن کاملDirect 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.
متن کاملDirect CP Violation in Charmless B Decays
We report the updated results of direct CP violation measurements from Belle and BaBar for the following modes: B → h+h−/h±π0, B → η( )h± and B → K±π±π∓, where h stands for a charged kaon or pion. The data used in these studies are up to 386 million BB̄ pairs for Belle and 232 million BB̄ pairs for BaBar. The current significant measurements include: ACP (B → K +π−) = −0.108 ± 0.016, ACP (B → ρ 0...
متن کاملReview of the NA48 CP violation measurements with neutral and charged kaons
The main results on the CP violation measurements with neutral and charged kaons from the NA48 experiment at the CERN SPS are reviewed in this paper. The direct CP violating parameter Re(ε′/ε) has been measured by NA48 from the decay rates of neutral kaons into pion pairs. The final result, based on the data collected in 1997, 1998, 1999 and 2001, clearly established the existence of direct CP ...
متن کاملOn Possibility of Decoherence in Correlated two Neutral Kaon Systems
We point out that decoherence parameters in the correlated two neutral kaon system breaks the transformation invariance of basis and their magnitude are stringently limited by the experimentally measured magnitudes of CP violation and of the strangeness non conserving ∆S = ±2 transitions. PACS numbers:14.40.Aq, 03.65.-W, 11.30.Ly, 80.70.+c Typeset using REVTEX
متن کامل