Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-04-16
Eur.Phys.J.C7:113-122,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 13 postscript figures, latex using epsf.sty; misprints in (12),(61),(82) corrected, minor changes in text and in som
Scientific paper
10.1007/s100529800956
We study the production of charginos e^+ e^- -> chi^+_i chi^-_j, (i,j=1,2) with polarized beams and the subsequent decays chi^+_i -> chi^0_k ell^+ nu and chi^-_j -> chi^0_l ell^- nu, (k,l=1,...,4), including the complete spin correlations between production and decay. Analytical formulae are presented for the joint spin-density matrix of the charginos, for the chargino decay matrix and for the differential cross section of the combined processes of production and decays. We present numerical results for pair production of the lighter chargino with unpolarized beams and the leptonic decay of chi^+_1 into the lightest neutralino chi^0_1. The lepton angular distribution and the forward-backward asymmetry are studied in four representative scenarios for sqrt{s}=192 GeV and sqrt{s}=200 GeV.
Bartl Alfred
Fraas Hans
Majerotto Walter
Moortgat--Pick Gudrid
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