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

IIn the minimal supersymmetric standard model ( MSSM), we study the light Higgs boson radiation of a light-chargino pair in the process e(+)e(-) -> h (chi) over tilde (+)(1)(chi) over tilde (-)(1) at linear colliders with root s = 500 GeV. We analyze cross sections in the regions of the MSSM parameter space where the process e(+)e(- ->) h (chi) over tilde (+)(1)(chi) over tilde (-)(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(- ->) h (chi) over tilde (+)(1)(chi) over tilde (-)(1) production rate could provide a determination of the Higgs boson couplings to charginos.