1998/04/30 by G. Moortgat-Pick, H. Fraas, A. Bartl +1 · 3 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1007/s100529800956
published as Eur.Phys.J.C7:113-122,1999 · 20 pages, 13 postscript figures, latex using epsf.sty; misprints in (12),(61),(82) corrected, minor changes in text and in some numerical results; version to appear in Eur.Phys.J.C
arxiv created 1998/07/22 · openalex publication_date 1999/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 -> chi0k ell+ nu and chi-j -> chi0l 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 chi01. The lepton angular distribution and the forward-backward asymmetry are studied in four representative scenarios for sqrts=192 GeV and sqrts=200 GeV.