Light staus and enhanced Higgs diphoton rate with non-universal gaugino masses and SO(10) Yukawa unification

Understand

It is shown that substantially enhanced Higgs to diphoton rate induced by light staus with large left-right mixing in MSSM requires at the GUT scale non-universal gaugino masses with bino and/or wino lighter than gluino.

• The possibility of such enhancement is investigated in MSSM models with arbitrary gaugino masses at the GUT scale with additional restriction of top-bottom-tau Yukawa unification, as predicted by minimal SO(10) GUTs.
• Many patterns of gaugino masses leading to enhanced Higgs to diphoton rate and the Yukawa unification are identified.
• Some of these patterns can be accommodated in a well-motivated scenarios such as mirage mediation or SUSY breaking F-terms being a non-singlet of SO(10).