What question did this study set out to answer?

This research aims to analyze CP violation in K->3π decays under the Standard Model and various supersymmetric models.

March 5, 2026Open Access

Direct CP violation in K->3π decays induced by SUSY chromomagnetic penguins

Key Points

This research aims to analyze CP violation in K->3π decays under the Standard Model and various supersymmetric models.
Analyzed CP asymmetry in K^±(3π)± decays.
Utilized mass insertion approximation for supersymmetric extensions.
Compared effects of Standard Model and supersymmetric contributions.
Found CP violation asymmetry of O(10^{-5}) in the Standard Model.
In supersymmetric models, effects can reach O(10^{-4}) under specific parameter ranges.

Abstract

An analysis of the CP violating asymmetry in K^± (3π) ± decays in the Standard Model and, by means of the mass insertion approximation, in a wide class of possible supersymmetric extensions, is presented. We find that the natural order of magnitude for this asymmetry is O (10^-5) in both cases. Within supersymmetric models effects as large as O (10^-4) are possible, but only in a restricted range of the relevant parameters.

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