Precision measurements of threshold chargino production

Abstract

We analyze the prospects at a muon collider for measuring chargino masses in the ${\mu }^{+}{\mu }^{-}\to {\tilde{\chi }}^{+}{\tilde{\chi }}^{-}$ processes in the threshold region. We find that a measurement of the lightest chargino mass to better than 200 MeV is possible with 100~fb${}^{-1}$ luminosity. The muon sneutrino mass can also be simultaneously measured to a few GeV.

Comments: 7 pages, 3 figure, Presented at the Workshop on Physics at the First Muon Collider and at the Front End of a Muon Collider, November 6-9, 1997, Fermi National Accelerator Laboratory