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Spin effects in neutralino production in e+ e- annihilation with polarized beams

Authors
  • Moortgat-Pick, Gudrid A.
  • Fraas, H.
  • Bartl, A.
  • Majerotto, W.
Publication Date
Jan 01, 1998
Source
INSPIRE-HEP
Keywords
License
Unknown
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Abstract

We study the process e^+ e^- -> chi^0_1 chi^0_2 and the subsequent decay chi^0_2 -> chi^0_1 l^{+} l^{-}$ with polarized beams, including the complete spin correlations of chi^0_2$. We present numerical results for the lepton energy and angular distributions, and for the distribution of the opening angle between the leptons for sqrt{s}=500 GeV. The effects of spin correlations are important in the lepton angular distribution, especially for gaugino-like neutralinos. The opening angle distribution is particularly suitable for distinguishing between higgsino- and gaugino-like neutralinos. The polarized cross sections and lepton angular distributions are very sensitive to the mixing of the neutralinos.

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