Flavor-Tuned 125 GeV SUSY Higgs Boson at the LHC: MSSM and NATURAL SUSY TESTS

TL;DR

This paper explores how the observed 125 GeV Higgs boson signals can be explained within MSSM and Natural SUSY frameworks, highlighting different parameter regimes and their impact on Higgs decay rates.

Contribution

It provides a detailed analysis of flavor-tuned MSSM and Natural SUSY scenarios, deriving sum rules and predicting distinct Higgs decay rate patterns based on SUSY parameters.

Findings

Enhanced gamma gamma signal linked to MSSM Higgs composition.

MSSM sum rule relates gamma gamma and bb decay rates.

Natural SUSY predicts reduced gamma gamma and increased bb rates.

Abstract

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 (Hu0,Hd0) 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 bb rates, and the gamma gamma enhancement predicts the bb reduction. On the contrary, Natural SUSY requires | mu | < 0.5 TeV, for which gamma gamma is reduced and $b\bar b$ is enhanced. This conclusion is independent of the mA-value and the SUSY quantum correction Deltab. Relative tau tau to bb rates are sensitive to Deltab.