Impact of squark pair decay modes on search for supersymmetric neutral Higgs bosons

Abstract

We present a detailed study of the decays of the neutral Higgs bosons $H^0$ and $A^0$ within the Minimal Supersymmetric Standard Model. We find that the supersymmetric modes $\tilde{t}\overline{\stackrel{~}{t}}$ and $\tilde{b}\overline{\stackrel{~}{b}}$ can dominate the $H^0$ and $A^0$ decays in a wide range of the model parameters due to large Yukawa couplings and mixings of $\tilde{t}$ and $\tilde{b}$. Compared to the conventional modes $t\bar{t}$ and $b\bar{b}$, these modes have very distinctive signatures. This could have a decisive impact on the neutral Higgs boson searches at future colliders.

Comments: 15 pages, LaTeX, also available at ftp://physics.ge.seikei.ac.jp/Pub/preprint/itpsu9603.uu (uuencoded postscript)