2013
Test of MSSM and NATURAL SUSY by 125 GeV Higgs Boson
by
→
Pacific/Honolulu
420 (Watanabe Hall)
420
Watanabe Hall
Description
We show that an enhanced two-photon signal of the Higgs boson, $h$, observed with 125~GeV mass by the ATLAS and CMS collaborations, can be obtained if it is identified principally with the neutral $H_u^0$ of the two Higgs doublets of minimal Supersymmetry. We focus on sparticles and the pseudoscalar Higgs $A$ at the TeV scale. The off-diagonal element of the ($H_u^0$,$H_d^0$) mass matrix in the flavor basis must be suppressed, and this requires both a large Higgsino mass parameter, $\mu\sim$TeV, and large tan$\beta$. A MSSM sum rule is derived that relates $\gamma\gamma$ and $b\bar b$ rates, and a $\gamma\gamma$ enhancement relative to the SM predicts the $b\bar b$ reduction. On the contrary, Natural SUSY requires $|\mu|\stackrel{<}{\scriptscriptstyle \sim}0.5$~TeV, for which $\gamma\gamma$ is reduced and $b\bar b$ is enhanced. This conclusion is independent of the $m_A$-value and the SUSY quantum correction $\Delta_b$. Relative $\tau\bar\tau$ to $b\bar b$ rates are sensitive to $\Delta_b$.