Decays of $H^0/A^0$ in supersymmetric scenarios with heavy sfermions

TL;DR

This paper explores MSSM scenarios with heavy sfermions but lighter Higgs bosons near the electroweak scale, proposing distinctive LHC signals and addressing SUSY flavor and CP problems through decoupling.

Contribution

It demonstrates that MSSM Higgs bosons can be light despite heavy sfermions, expanding viable SUSY models and suggesting new collider signatures.

Findings

Light MSSM Higgs bosons are compatible with heavy sfermions.

Distinctive LHC signals can arise from these scenarios.

Such models can include a dark matter candidate near the EW scale.

Abstract

The recent discovery of a new boson at the LHC, which resembles a SM-like Higgs boson with $m_h=125$ GeV, is starting to provide strong guidelines into SUSY model building. For instance, the identification of such a state with the lightest CP-even Higgs boson of the MSSM ($h^0$), requires large values of $\tan\beta$ and/or heavy sfermions. One outcome of this result is the possibility to solve the SUSY flavor and CP problems by decoupling, which points towards some realization of Split-inspired SUSY scenarios, in which scalars are much heavier than gauginos and higgsinos. However, we argue here that the remaining Higgs bosons of the MSSM ($H^0$, $A^0$, $H^{\pm}$) do not have to be as heavy as the sfermions, and having them with masses near the EW scale does not pose any conflict with current MSSM constraints. We discuss then some SUSY scenarios with heavy sfermions, from a bottom-up approach, which contain the full Higgs sector, as well as a possible dark matter candidate, with masses near the EW scale, and identify distinctive signals from these scenarios that could be searched at the LHC.