A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino

Abstract

We consider the three--body decay stop_1 -> b tau+ tau-sneutrino and propose the asymmetry of the tau polarization perpendicular to the decay plane as a CP sensitive observable. We calculate this asymmetry in the Minimal Supersymmetric Standard Model taking the parameters mu and A_t complex. In the parameter domain where the decay stop_1 -> b tau+ tau-sneutrino is important this asymmetry can go up to 30%. We also estimate the event rates necessary to observe this asymmetry at 90% CL.

LaTex, 9 pages, 3 figures, v2, improved treatment of transversal polarized taus, modified table, conclusions unchanged

References in corpus (4)

• CP-Violating Phases in SUSY, Electric Dipole Moments, and Linear Colliders
• Analysis of the Neutralino System in Supersymmetric Theories
• General Flavor Blind MSSM and CP Violation
• Three-Body Decays of Top and Bottom Squarks

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• Measurement of CP Violation in Stop Cascade Decays at the LHC
• T-odd Correlations in the Decay of Scalar Fermions
• Probing SUSY CP Violation in Two-Body Stop Decays at the LHC
• Probing CP Violation with and without Momentum Reconstruction at the LHC
• Triple product correlations in top squark decays
• CP asymmetries in scalar bottom quark decays
• CP violation in sbottom decays
• Normal tau polarisation as a sensitive probe of CP violation in chargino decay
• SUSY CP phases and asymmetries at colliders
• CP violation in decays of the lightest supersymmetric particle with bilinearly broken R parity