Static Quantities of the W bosons in the MSSM

I discuss the static quantities of the W boson, magnetic dipole and electric quadrupole moments, in the context of the minimal supersymmetric standard model, in which supersymmetry is broken by soft terms Ao, mo, M1/2. Following a renormalization group analysis it is found that the supesymmetric values of ∆kγ and ∆Qγ can be largely different, in some cases, from the standard model predictions but of the same order of magnitude for values of A0,m0,M1/2 ≤ O(1TeV ). Therefore possible supersymmetric structure can be probed provided the accuracy of measurements for ∆kγ , ∆Qγ reaches 10 −2 − 10 and hence hard to be detected at LEP2. In cases where M1/2 ≪ A0,m0, the charginos and neutralinos may give substantial contributions saturating the LEP2 sensitivity limits. This occurs when their masses mC̃ , mZ̃ turn out to be both light satisfying mC̃ +mZ̃ ≃ MW . However these extreme cases are perturbatively untrustworthy and besides unnatural for they occupy a small region in the parameter space.