Constraining the Sneutrino Mass in Chargino Production and Decay with Polarized Beams

Details Constraining the Sneutrino Mass in Chargino Production and Decay with Polarized Beams Constraining the Sneutrino Mass in Chargino Production and Decay with Polarized Beams

1999-04-01

arxiv.org/abs/hep-ph/9904209v1

Acta Phys.Polon. B30 (1999) 1999-2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages,8 postscript figures, latex using epsfig and appb.sty; presented at the Cracow Epiphany Conference on Electron-Positr

Scientific paper

Production and decay of gaugino-like charginos are crucially determined by sneutrino exchange. Therefore we study the pair production of charginos e^+ e^- -> chi^+_1 chi^-_1 with polarized beams and the subsequent decay chi^-_1 -> chi^0_1 e^- nu_e, including the complete spin correlations between production and decay. The spin correlations have strong influence on the decay angular distribution and on the corresponding forward-backward asymmetry. We show for two representative scenarios for sqrt{s}=270 GeV and for sqrt{s}=500 GeV that forward-backward asymmetries for polarized beams are an important tool for constraining the sneutrino mass m_{tilde{nu}_e}.

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