Residual effects of heavy sparticles in bottom quark Yukawa coupling: a comparative study for MSSM and NMSSM

Preprint
Publisher Website
Google Scholar
  • 24 January 2009
Abstract
If the sparticles are relatively heavy (a few TeV) while the Higgs sector is not so heavy (m_A is not so large), the Higgs boson Yukawa couplings can harbor sizable quantum effects of sparticles and these large residual effects may play a special role in probing supersymmetry at foreseeable colliders. In this work, focusing on the supersymmetric QCD effects in the h-b-b_bar coupling, we give a comparative study for the two popular supersymmetric models: MSSM and NMSSM. While for both models the supersymmetric QCD can leave over large residual quantum effects in h-b-b_bar coupling, the NMSSM can allow for a much broader region of such effects. Since these residual effects can be over 20% for the h-b-b_bar coupling (and thus over 40% for the ratio Br(h->b b_bar)/Br(h->\tau^+ \tau^-)), future measurements may unravel the effects of heavy sparticles or even distinguish the two models.

This publication has 0 references indexed in Scilit: