Slim SUSY

TL;DR

Slim SUSY is a proposed supersymmetric model featuring heavy sfermions and light gauginos/higgsinos, with heavy Higgs bosons near the electroweak scale, offering distinctive LHC signatures and reducing fine-tuning issues.

Contribution

It introduces the Slim SUSY scenario, a novel MSSM variant with specific mass hierarchies, and explores its collider phenomenology and constraints.

Findings

Heavy Higgs bosons near the EW scale can produce distinctive LHC signals.

Slim SUSY reduces fine-tuning by having sfermions heavy and gauginos/higgsinos light.

The scenario is consistent with current Higgs and superpartner mass bounds.

Abstract

The new SM-like Higgs boson discovered recently at the LHC, with mass $m_h \simeq$ 125 GeV, as well as the direct LHC bounds on the mass of superpartners, which are entering into the TeV range, suggest that the minimal surviving supersymmetric extension of the SM (MSSM), should be characterized by a heavy SUSY-breaking scale. Several variants of the MSSM have been proposed to account for this result, which vary according to the accepted degree of fine-tuning. We propose an alternative scenario here, Slim SUSY, which contains sfermions with multi-TeV masses and gauginos/higgsinos near the EW scale, but it includes the heavy MSSM Higgs bosons ($H^0$, $A^0$, $H^\pm$) near the EW scale too. We discuss first the formulation and constraints of the Slim SUSY scenario, and then identify distinctive heavy Higgs signals that could be searched at the LHC, within scenarios with the minimal number of superpartners with masses near the EW scale.