Inspiration from Intersecting D-branes: General Supersymmetry Breaking Soft Terms in No-Scale ${\cal F}$-$SU(5)$

TL;DR

This paper explores a string-inspired supersymmetry model with vector-like particles, analyzing its phenomenology under current experimental constraints, and identifies four viable parameter regions consistent with dark matter and Higgs observations.

Contribution

It introduces a No-Scale ${ m F}$-$SU(5)$ model with flippons, evaluating its phenomenology and viability against experimental data, including LHC constraints and dark matter relic density.

Findings

Four viable parameter regions identified: stop coannihilation, Higgsino dark matter, Higgs funnel, stau coannihilation.

All regions compatible with 125 GeV Higgs and relic density constraints, except pure Higgsino case.

Model predictions for LHC signatures for each scenario.

Abstract

Motivated by D-brane model building, we evaluate the $\cal{F}$-$SU(5)$ model with additional vector-like particle multiplets, referred to as flippons, within the framework of No-Scale Supergravity with non-vanishing general supersymmetry breaking soft terms at the string scale. The viable phenomenology is uncovered by applying all current experimental constraints, including but not limited to the correct light Higgs boson mass, WMAP and Planck relic density measurements, and several LHC constraints on supersymmetric particle spectra. Four interesting regions of the parameter space arise, as well as mixed scenarios, given by: (i) light stop coannihilation; (ii) pure Higgsino dark matter; (iii) Higgs funnel; and (iv) light stau coannihilation. All regions can generate the observed value of the relic density commensurate with a 125 GeV light Higgs boson mass, with the exception of the relatively small relic density value for the pure Higgsino lightest supersymmetric particle (LSP). This work is concluded by gauging the model against present LHC search constraints and derivation of the final states observable at the LHC for each of these scenarios.