Advertisement

Determining SUSY parameters in chargino pair-production in \(e^+e^-\) collisions

  • S.Y. Choi
  • A. Djouadi
  • H.S. Song
  • P.M. Zerwas
Theoretical phyiscs

Abstract.

In most supersymmetric theories, charginos \(\tilde{\chi}^\pm_{1,2}\), 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 \(e^+e^- \rightarrow \tilde{\chi}_i^- \tilde{\chi}_j^+ \, \, [i,j=1,2]\), 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.

Keywords

Electron Beam Total Cross Section Mass Parameter Vacuum Expectation Higgs Doublet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • S.Y. Choi
    • 1
  • A. Djouadi
    • 2
  • H.S. Song
    • 3
  • P.M. Zerwas
    • 4
  1. 1. Korea Institute for Advanced Study, 207–43, Cheongryangri–dong, Dongdaemun–gu, Seoul 130–012, Korea KR
  2. 2. Phys. Math. et Théorique, Université Montpellier II, F–34095 Montpellier, France FR
  3. 3. Center for Theoretical Physics and Department of Physics, Seoul National University, Seoul 151-742, Korea KR
  4. 4. DESY, Deutsches Elektronen-Synchrotron, D–22603 Hamburg, Germany DE

Personalised recommendations