Determining SUSY Parameters in Chargino Pair-Production in $e^{+}{e}^{-}$ Collisions

Abstract

In most supersymmetric theories, charginos ${\tilde{\chi }}_{1,2}^{\pm }$, mixtures of charged color-neutral gauginos and higgsinos, belong to the class of the lightest supersymmetric particles. They are easy to observe at $e^{+}{e}^{-}$ colliders. By measuring the total cross sections and the left-right asymmetries with polarized electron beams in $e^{+}{e}^{-}\to {\tilde{\chi }}_i^{-}{\tilde{\chi }}_j^{+}[i,j=1,2]$, the chargino masses and the gaugino-higgsino mixing angles can be determined. From these observables the fundamental SUSY parameters can be derived: the SU(2) gaugino mass $M_2$, the modulus $|\mu |$ and $\cos {\Phi }_{\mu }$ of the higgsino mass parameter, and $\tan \beta =v_2/v_1$, the ratio of the vacuum expectation values of the two neutral Higgs doublet fields. The solutions are unique; the CP-violating phase ${\Phi }_{\mu }$ can be determined uniquely by analyzing effects due to the normal polarization of the charginos.

20 pages, 4 figures, uses axodraw.sty

Cited by in corpus (16)

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• Chargino Pair Production at $e^{+}{e}^{-}$ Colliders with Polarized Beams
• NLO Event Generation for Chargino Production at the ILC
• CP sensitive observables in chargino production and decay into a W boson
• CP sensitive observables in chargino production with transverse $e^{\pm }$ beam polarization
• CP-odd observables in neutralino production with transverse e+ and e- beam polarization
• CP violation in unpolarized e^+ e^- to charginos at one loop level
• Effects of Lepton Flavour Violation on Chargino Production at the Linear Collider
• Generation Mixing of Sneutrinos in Heavier Chargino Decay
• CP-Odd Phase Effects in a Left-Right Symmetric Chargino Sector
• Effects of CP-violating phases in supersymmetry
• Determining fundamental parameters from the chargino sector in Left-Right Supersymmetric models
• Complementarity of the CERN Large Hadron Collider and the $e^{+}{e}^{-}$ International Linear Collider
• Complementarity of LHC and ILC
• CP violation in chargino production in e+e- collisions
• CP violation in the chargino/neutralino sector of the MSSM