T-odd Correlations in the Decay of Scalar Fermions

Abstract

We define a CP sensitive asymmetry in the sfermion decays $\ti f \to f \tiχ^0_j \ell \bar \ell, f \tiχ^0_j q \bar q$, based on triple product correlations between the momenta of the outgoing fermions. We study this asymmetry in the MSSM with complex parameters. We show that the asymmetry is sensitive to the phases of the parameters $\mu$ and $M_1$. The leading contribution stems from the decay chain $\ti f\to f \tiχ^0_j\to f \tiχ^0_1 Z\to f \tiχ^0_1 \ell \bar \ell (f \tiχ^0_1 q \bar q)$, for which we obtain analytic formulae for the amplitude squared. The asymmetry can go up to 3% for $\ti f\to f \tiχ^0_1 \ell \bar \ell$, and up to 20% for $\ti f\to f \tiχ^0_1 q \bar q$. We also estimate the rates necessary to measure the asymmetry.

18 pages, 5 figures, 2 tables; comments and references added; two tables added; version to appear in Eur. Phys. J

References in corpus (2)

• Analysis of CP Violation in Neutralino Decays to Tau Sleptons
• CP violation in chargino decays in the MSSM

Cited by in corpus (24)

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• Impact of CP phases on stop and sbottom searches
• A CP asymmetry in e^+e^- \to χ^0_iχ^0_j \to χ^0_j τstau_k with tau polarization
• Measurement of CP Violation in Stop Cascade Decays at the LHC
• Probing SUSY CP Violation in Two-Body Stop Decays at the LHC
• Probing CP Violation with and without Momentum Reconstruction at the LHC
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• Triple product correlations in top squark decays
• CP-violating asymmetry in chargino decay into neutralino and W boson
• CP asymmetries with Longitudinal and Transverse Beam Polarizations in Neutralino Production and Decay into the Z^0 Boson at the ILC
• 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
• Testing the CP-violating MSSM in stau decays at the LHC and ILC
• Measurement of CP asymmetries in neutralino production at the ILC
• CP asymmetries in the supersymmetric trilepton signal at the LHC
• SUSY CP phases and asymmetries at colliders
• CP-sensitive spin-spin correlations in neutralino production at the ILC
• CP asymmetries in neutralino production
• Effects of CP-violating phases in supersymmetry
• Impact of CP phases on SUSY particle production and decays