Testing the CP-violating MSSM in stau decays at the LHC and ILC

Abstract

We study CP violation in the two-body decay of a scalar tau into a neutralino and a tau, which should be probed at the LHC and ILC. From the normal tau polarization, a CP asymmetry is defined which is sensitive to the CP phases of the trilinear scalar coupling parameter $A_{\tau }$, the gaugino mass parameter $M_1$, and the higgsino mass parameter $\mu$ in the stau-neutralino sector of the Minimal Supersymmetric Standard Model. Asymmetries of more than 70% are obtained in scenarios with strong stau mixing. As a result, detectable CP asymmetries in stau decays at the LHC are found, motivating further detailed experimental studies for probing the SUSY CP phases.

14 pages, 7 figures, added references, corrected typos, revised figs.5b and 6a, physics unchanged

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Cited by in corpus (6)

• Neutrino masses and mixings in the baryon triality constrained minimal supersymmetric standard model
• Heavy Scalar Tau Decays in the Complex MSSM: A Full One-Loop Analysis
• Measurement of CP asymmetries in neutralino production at the ILC
• CP asymmetries in the supersymmetric trilepton signal at the LHC
• Momentum reconstruction at the LHC for probing CP-violation in the stop sector
• CP-violation in SUSY cascades at the LHC