Spin Effects in Neutralino Production in $e^+e^-$ Annihilation with polarized beams

Details Spin Effects in Neutralino Production in $e^+e^-$ Annihilation with polarized beams Spin Effects in Neutralino Production in $e^+e^-$ Annihilation with polarized beams

1998-03-11

arxiv.org/abs/hep-ph/9803304v1

Acta Phys.Polon. B29 (1998) 1497-1504

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 8 postscript figures, latex using appb.sty (included) and epsf.sty; Contribution to the Cracow Epiphany Conference on

Scientific paper

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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