Explicit CP violation in the Dine-Seiberg-Thomas model

TL;DR

This paper investigates explicit CP violation in a supersymmetric model with dimension-five operators, analyzing its compatibility with experimental data at LEP2, and finds potential consistency at the one-loop level.

Contribution

It introduces a detailed analysis of explicit CP violation in the Dine-Seiberg-Thomas model, considering complex phases in operators and scalar top quark masses, and assesses experimental viability.

Findings

CP violation may be feasible at one-loop level

Neutral Higgs masses can align with LEP2 data

Couplings to Z bosons remain consistent with experiments

Abstract

The possibility of explicit CP violation is studied in a supersymmetric model proposed by Dine, Seiberg, and Thomas, with two effective dimension-five operators. The explicit CP violation may be triggered by complex phases in the coefficients for the dimension-five operators in the Higgs potential, and by a complex phase in the scalar top quark masses. Although the scenario of explicit CP violation is found to be inconsistent with the experimental data at LEP2 at the tree level, it may be possible at the one-loop level. For a reasonable parameter space, the masses of the neutral Higgs bosons and their couplings to a pair of $Z$ bosons are consistent with the LEP2 data, at the one-loop level.