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

1998/03/11 by G. Moortgat-Pick, H. Fraas, A. Bartl +1
Physics and Astronomy · #hep-ph

paper · pdf

published as Acta Phys.Polon. B29 (1998) 1497-1504 · 7 pages, 8 postscript figures, latex using appb.sty (included) and epsf.sty; Contribution to the Cracow Epiphany Conference on Spin Effects in Particle Physics, Cracow, January 9-11 1998

arxiv created 1998/03/11 · arxiv updated 2009/11/30

Abstract

We study the process e⁺ e^- -> chi⁰₁ chi⁰₂ and the subsequent decay chi⁰₂ -> chi⁰₁ l⁺ l^- with polarized beams, including the complete spin correlations of chi⁰₂. We present numerical results for the lepton energy and angular distributions, and for the distribution of the opening angle between the leptons for sqrts=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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