Bounds on "charginos nearly degenerate with the lightest neutralino" mass from precision measurements

Abstract

Though LEP II direct searches still cannot exclude a chargino nearly degenerate with the lightest neutralino if its mass is only slightly above half of the Z boson mass and the sneutrino is light, it can be excluded indirectly analyzing precision data. In this particular limit simple analytical formulas for oblique electroweak radiative corrections are presented.

Comments: 4 pages, LaTeX, 1 figure included. Talk given at PASCOS99 conference, Lake Tahoe, California, December 10-16, 1999