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

1999/04/01 by G. Moortgat-Pick, H. Fraas
Physics and Astronomy · #hep-ph

paper · pdf

published as Acta Phys.Polon. B30 (1999) 1999-2011 · 14 pages,8 postscript figures, latex using epsfig and appb.sty; presented at the Cracow Epiphany Conference on Electron-Positron Colliders, Cracow, January 5-10, 1999, to appear in ActaPhys Pol

arxiv created 1999/04/01 · arxiv updated 2009/11/30

Abstract

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 -> chi⁰₁ 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 sqrts=270 GeV and for sqrts=500 GeV that forward-backward asymmetries for polarized beams are an important tool for constraining the sneutrino mass m_tildenu_e.

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