The Oblique Corrections from Heavy Scalars in Irreducible   Representations
  The contributions to $S$, $T$, and $U$ from heavy scalars in any irreducible representation of the electroweak gauge group $SU(2)_L\times U(1)_Y$ are obtained. We find that in the case of a heavy scalar doublet there is a slight difference between the $S$ parameter we have obtained and that in previous works. 
Hong-Hao Zhang, Wen-Bin Yan, Xue-Song Li