$B^0\hbox{--}\bar B^0$ MIXING WITH THE CONSTRAINT OF A 125 GeV HIGGS

Considering the constraints from the current experiment results, we analyze mixing with a Higgs boson around 125 GeV, and discuss the influence of MA, tanβ to the mh and ΔmB in the Minimal Supersymmetric Standard Model (MSSM). We find these constraints have a strong impact to the parameters of MA and tanβ, they almost exclude the small MA and large tanβ, to have a obvious correction to the mass difference ΔmB we argue that the MA should not too large, it is possible to observe the MA boson with a mass 300 ~ 400 GeV in the future.