CP,T and/or CPT Violations in the K0-K0bar System --Implications of the KTeV,NA48 and CPLEAR Results

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dc.creatorKouchi, Yutaka
dc.creatorTakeuchi, Yoshihiro
dc.creatorTsai, S. Y.
dc.date2000-02-14
dc.date.accessioned2026-07-07T12:25:56Z
dc.date.available2026-07-07T12:25:56Z
dc.descriptionPossible violation of CP, T and/or CPT symmetries in the $\ko$-$\kob$ system is studied from a phenomenological point of view. For this purpose, we first introduce parameters which represent violation of these symmetries in mixing parameters and decay amplitudes in a convenient and well-defined way and, treating these parameters as small, derive formulas which relate them to the experimentally measured quantities. We then perform numerical analyses, with the aid of the Bell-Steinberger relation, to derive constraints to these symmetry-violating parameters, firstly paying particular attention to the results reported by KTeV Collaboration and NA48 Collaboration, and then with the results reported by CPLEAR Collaboration as well taken into account. A case study, in which either CPT symmetry or T symmetry is assumed, is also carried out. It is demonstrated that CP and T symmetries are violated definitively at the level of 10^{-4} in $2π$ decays and presumably at the level of 10^{-3} in the $\ko-\kob$ mixing, and that the Bell-Steinberger relation helps us to establish CP and T violations being definitively present in the $\ko-\kob$ mixing and to test CPT symmetry to a level of 10^{-4} ~ 10^{-5}.
dc.description21 pages, 1 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0002136
dc.identifierhttp://arxiv.org/abs/hep-ph/0002136
dc.identifierEur.Phys.J.C17:269-277,2000
dc.identifierdoi:10.1007/s100520000435
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214725
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCP,T and/or CPT Violations in the K0-K0bar System --Implications of the KTeV,NA48 and CPLEAR Results
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