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Testing violation of CPT and quantum mechanics in the K{sub 0} {minus} {bar K}{sub 0} system

Patrick Huet

Published May 1, 1994• 0 citations
OpenAlex

Abstract

I report a recent study made in collaboration with M.E. Peskin, on the time dependence of a kaon beam propagating according to a generalization of quantum mechanics due to Ellis, Hagelin, Nanopoulos and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states to mixed states. Constraints on the magnitude of its parameters are established on the basis of existing experimental data. New facilities such as {phi} factories are shown to be particularly adequate to study this generalization from quantum mechanics and to disentangle its parameters from other CPT violating perturbations of the kaon system.

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I report a recent study done in collaboration with M.E. Peskin, on the time dependence of a kaon beam propagating according to a generalization of quantum mechanics due to Ellis, Hagelin, Nanopoulos and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states to mixed states. Constraints on the magnitude of its parameters are established on the basis of existing experimental data. New facilities such as phi-factories are shown to be particularly adequate to study this generalization from \qm\ and to disentangle its parameters from other CPT violating perturbations of the kaon system. ( To appear in Proceedings of the First International Conference on Phenomenology of Unification from Present to Future, Roma, ITALY -- March 23-26, 1994.)

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I report a recent study made in collaboration with M.E. Peskin, on the time dependence of a kaon beam propagating according to a generalization of quantum mechanics due to Ellis, Hagelin, Nanopoulos and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states to mixed states. Constraints on the magnitude of its parameters are established on the basis of existing experimental data. New facilities such as {phi} factories are shown to be particularly adequate to study this generalization from quantum mechanics and to disentangle its parameters from other CPT violating perturbations of the kaon system.
I report a recent study done in collaboration with M.E. Peskin, on the time dependence of a kaon beam propagating according to a generalization of quantum mechanics due to Ellis, Hagelin, Nanopoulos and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states to mixed states. Constraints on the magnitude of its parameters are established on the basis of existing experimental data. New facilities such as phi-factories are shown to be particularly adequate to study this generalization from \qm\ and to disentangle its parameters from other CPT violating perturbations of the kaon system. ( To appear in Proceedings of the First International Conference on Phenomenology of Unification from Present to Future, Roma, ITALY -- March 23-26, 1994.)
We reconsider the model of quantum mechanics violation in the K 0 -K0 system, due to Ellis, Hagelin, Nanopoulos, and Srednicki, in which CP-and CPT -violating signatures arise from the evolution of pure states into mixed states.We present a formalism for computing time-dependent asymmetries in this model and show that present data constrains its parameters significantly.In the future, this model will be put to very stringent tests at a φ factory.We present the theory of these tests and show the relation between particular φ decay correlations and the parameters of quantum mechanics violation.
We reconsider the model of quantum mechanics violation in the K0−K0 system, due to Ellis, Hagelin, Nanopoulos, and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states into mixed states. We present a formalism for computing time-dependent asymmetries in this model and show that present data constrains its parameters significantly. In the future, this model will be put to very stringent tests at a ø-factory. We present the theory of these tests and show the relation between particular ø-decay correlations and the parameters of quantum mechanics violation.
Neutral kaons produced in the correlated pairs at the DAΦNE ϕ\phiϕ -factory offer unique possibilities to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The analysis of the data collected by the KLOE experiment allows to improve results on several parameters describing CPT violation and decoherence, and to measure the regeneration cross section on the beam pipe materials.
A review of the experimental status of CPT invariance leads to two conclusions: (i) There is no hint of a CPT violation in the data. (ii) CPT invariance has not been probed with a quantitative sensitivity that greatly exceeds that achieved in studies of CP symmetry. I sketch some models where CPT violations could be implemented. Yet it is hard to see how those types of ansatz could generate observable effects in the transitions of neutral K mesons. On the other hand the quite special quantum aspects of the reaction φ → KL KS can be harnessed to probe quantum mechanics in novel ways by analyzing EPR like correlations of a kind that have not been studied before. Some comparisons are made with Weinberg's recent formulation of non-linear (though homogenous) quantum mechanics and with generalizations that can be obtained from Bohm's interpretation of quantum mechanics.