Sparticle production in electron photon collisions

Sep, 1997
18 pages
Published in:
  • Phys.Lett.B 419 (1998) 233-242
e-Print:
Report number:
  • MADPH-97-1000,
  • UCD-97-18

Citations per year

199720022007201220150123456
Abstract:
We explore the potential of electron-photon colliders to measure fundamental supersymmetry parameters via the processes eγe~χ~0e\gamma \to \tilde e \tilde\chi^0 (selectron-neutralino) and eγν~χ~e\gamma\to \tilde\nu \tilde\chi^- (sneutrino-chargino). Given the χ~0\tilde\chi^0 and χ~\tilde\chi^- masses from e+ee^+e^- and hadron collider studies, cross section ratios σ(γ)/σ(γ+)\sigma(\gamma_-)/\sigma(\gamma_+) for opposite photon helicities determine the ν~L\tilde\nu_L, e~L\tilde e_L and e~R\tilde e_R masses, independent of the sparticle branching fractions. The difference mν~L2me~L2m_{\tilde\nu_L}^2-m_{\tilde e_L}^2 measures MW2cos2βM_W^2\cos2\beta in a model-independent way. The e~L\tilde e_L and e~R\tilde e_R masses test the universality of soft supersymmetry breaking scalar masses. The cross section normalizations provide information about the gaugino mixing parameters.
  • photon electron: exclusive reaction
  • supersymmetry: parametrization
  • supersymmetry: symmetry breaking
  • sparticle: photoproduction
  • selectron
  • sneutrino
  • neutralino
  • chargino
  • sparticle: decay modes
  • sparticle: branching ratio