CP Phases in Supersymmetric Tri-lepton Signals at the Tevatron

TL;DR

This paper investigates how CP phases in the minimal supersymmetric standard model influence tri-lepton signals at the Tevatron, revealing significant effects on particle spectra and event rates even under experimental constraints.

Contribution

It provides a detailed analysis of the impact of CP phases on supersymmetric tri-lepton signals, including mass spectrums and branching ratios, without assuming generational mixing.

Findings

CP phases strongly affect chargino and neutralino mass spectra.

CP phases can minimize tri-lepton event rates despite experimental constraints.

Significant variations in production cross sections and decay branching ratios due to CP phases.

Abstract

We have analyzed the supersymmetric tri-lepton signals for sparticle searches at the Tevatron in the minimal supersymmetric standard model with general CP phases without generational mixing. The CP phases may affect very strongly the chargino and neutralino mass spectrums and $\sigma(p\bar{p}\to\tilde{\chi}^-_1\tilde{\chi}^0_2)$ as well as ${\cal B}(\tilde{\chi}^-_1\to\tilde{\chi}^0_1\ell^-\nu)$ and ${\cal B}(\tilde{\chi}^0_2\to\tilde{\chi}^0_1\ell^+\ell^-)$. Even under the stringent constraints from the electron electric dipole moment the CP phases can lead to a minimum of the tri-lepton event rate for their non-trivial values.