Pure Gravity Mediation of Supersymmetry Breaking at the LHC

TL;DR

This paper explores pure gravity mediation as a minimal supersymmetry breaking scenario, analyzing current collider constraints and future LHC prospects for detecting gauginos, especially gluinos and winos.

Contribution

It introduces a simplified supersymmetry model with heavy scalars and loop-suppressed gaugino masses, and evaluates collider constraints and detection prospects.

Findings

Gluino masses below ~1 TeV are currently excluded.

Wino masses below ~300 GeV are currently excluded.

Future LHC runs can probe gluino masses up to ~2 TeV and winos up to 1 TeV.

Abstract

Supersymmetric theories which can allow for a 125 GeV Higgs mass and also solve the naturalness and susy flavor problems now require a fair degree of complexity. Here we consider the simplest possibility for supersymmetry near the weak scale, but with the requirement of naturalness dropped. In "pure gravity mediation", all supersymmetric particles except for the gauginos lie at tens to thousands of TeV, with the gauginos obtaining loop suppressed masses automatically by anomaly mediation and higgsino threshold corrections. The gauginos are the lightest superpartners, and we investigate the current collider constraints on their masses, as well as the future reach of the LHC. We consider gluino pair production with a jets + missing energy signature, as well as events with disappearing charged tracks caused by charged winos decaying into their neutral partners. We show that presently, gluino masses less than about 1 TeV and wino masses less than about 300 GeV are excluded, and that the 14 TeV LHC can probe gluino masses up to about 2 TeV and wino masses up to 1 TeV.