On the numerical value of the parameter

Abstract It happens that s2 and ŝ2 are equal with 0.1 % accuracy, though they are split by radiative corrections and a natural estimate for their difference is 1%. This degeneracy occurs only for mt value close to 170 GeV, so no deep physical reason can be attributed to it. However, another puzzle of the Standard Model, the degeneracy of s2 eff and s2, is not independent of the previous one since a good physical reason exists for s2 eff and ŝ2 degeneracy. We present explicit formulas which relate these three angles.