Implications of the top quark mass measurement for the SM Higgs boson mass MH

Abstract
Motivated by the recent determination of the top quark mass by the CDF Collaboration Mt=174+or-10-12+13 GeV, we study,the implications of the top quark mass measurement for the standard model Higgs boson mass MH based on the phenomenological analysis of the radiative correction Delta r at two-loop order. We find that: (a) the central value of MH is very sensitive to the variation of Mt; (b) the present data are in favour of the heavy Higgs boson, MH=340-270+770 GeV for Mt=174 GeV, but no reliable constraints on MH could be derived until the measurement of Mt reaches high precision.