  The $S$-wave scattering length and the effective range of the Higgs boson in
Standard Model are studied using effective-field-theory approach. After
incorporating the first-order electroweak correction, the short-range force
between two Higgs bosons remains weakly attractive for $M_H=126$ GeV. It is
interesting to find that the force range is about two order-of-magnitude larger
than the Compton wavelength of the Higgs boson, almost comparable with the
typical length scale of the strong interaction.
