Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-03-01
Eur.Phys.J. C9 (1999) 521-534; Erratum-ibid. C9 (1999) 549
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, 14 postscript figures, latex using epsf.sty, typographical errors corrected in eqs.(17),(60),(61),(64) and (65)
Scientific paper
We study the production of neutralinos e^+ e^- ->chi^0_i \chi^0_j with polarized beams and the subsequent decays chi^0_i -> chi^0_k l^+ l^- and chi^0_j -> chi^0_l l^+ l^-, including the complete spin correlations between production and decay. We present analytical formulae for the differential cross section of the combined process of production and decay of neutralinos. We also allow for complex couplings. The spin correlations have a strong influence on the decay angular distributions and the corresponding forward-backward asymmetries. They are very sensitive to the SUSY parameters and depend strongly on the beam polarizations. We present numerical results for the cross section and the electron forward-backward asymmetry for e^+ e^- -> chi^0_1 chi^0_2, chi^0_2 -> chi^0_1 e^+ e^-. We study the dependence on the parameter M' for various mass splittings between tilde{e}_L and tilde{e}_R and different beam polarizations.
Bartl Alfred
Fraas Hans
Majerotto Walter
Moortgat--Pick Gudrid
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