Associated production of a light Higgs boson and a chargino pair in the MSSM at linear colliders

摘要

In the minimal supersymmetric standard model (MSSM), we study the light Higgs boson radiation off a light-chargino pair in the process (e^{ + } e ^{-} o h ilde{chi }^{ + }_{1} ilde{chi }^{ - }_{1} ) at linear colliders with ({sqrt s } = 500;{ ext{Gev}}) GeV. We analyze cross sections in the regions of the MSSM parameter space where the process (e^{ + } e ^{-} o h ilde{chi }^{ + }_{1} ilde{chi }^{ - }_{1} ) cannot proceed via on-shell production and subsequent decay of either heavier charginos or the pseudoscalar Higgs boson A. Cross sections up to a few fb are allowed, according to present experimental limits on the Higgs boson, chargino and sneutrino masses. We also show how a measurement of the (e^{ + } e ^{-} o h ilde{chi }^{ + }_{1} ilde{chi }^{ - }_{1} ) production rate could provide a determination of the Higgs boson couplings to charginos.