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

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

2010-11-10

arxiv.org/abs/1011.2449v2

Phys.Rev.D83:095012,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.83.095012

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.

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