Constraining SUSY Models with Spontaneous CP-Violation via B->\psi K_s

TL;DR

This paper investigates how minimal supersymmetric models with spontaneous CP-violation impact CP asymmetry in B meson decays, revealing conflicts with neutron electric dipole moment constraints and challenging standard predictions.

Contribution

It demonstrates that spontaneous CP-violation in minimal SUSY models cannot reproduce the Standard Model's CP asymmetry in B decays without violating EDM bounds.

Findings

Standard Model predicts $ ext{sin} 2eta extgreater= 0.4$ in B decay

Spontaneous CP-violation models cannot match this without EDM violation

Implications for SUSY model building and CP violation mechanisms

Abstract

We study CP-violating effects in $B\to \psi K_{s}$ decay within minimal supersymmetric models with spontaneous CP-violation. We find that the CP-asymmetry predicted by the Standard Model in this decay, $\sin 2\beta \geq 0.4$, cannot be accommodated in these models without violating the bound on the neutron electric dipole moment. This result holds for NMSSM-like models with an arbitrary number of sterile superfields. Further implications of the scenario are discussed.