Exploring the Dark Sector of the inspired FNSM at the LHC

TL;DR

This paper explores a pseudo-Nambu-Goldstone boson dark matter candidate within the Froggatt-Nielsen Singlet Model, analyzing its parameter space and collider signatures at the LHC to detect this dark matter through missing energy and jets.

Contribution

It introduces a novel dark matter candidate linked to flavon symmetry-breaking and provides detailed collider analysis for its detection at the LHC.

Findings

Significant parameter space for pseudoscalar DM consistent with fermion mass hierarchy.

Large missing transverse energy signals from heavy Higgs decay can be used to detect DM.

Collider signatures include missing energy plus multiple jets, suitable for LHC Run 3.

Abstract

We establish the possibility of having a pseudo-Nambu-Goldstone boson (pNGB) Dark Matter (DM) candidate in the inspired Froggatt-Nielsen Singlet Model (iFNSM) wherein a direct connection exists between the DM mass and new flavon symmetry-breaking scale. We find a considerable allowed region of parameter space for the ensuing pseudoscalar DM, which is dependent upon the flavon Vacuum Expectation Value (VEV) and Yukawa couplings, over which it may be possible to explain the fermion mass hierarchy. Finally, we choose a Benchmark Point (BP) and perform detailed collider analyses to probe this DM state in the context of Run 3 of the Large Hadron Collider (LHC). Specifically, in this model, one obtains large missing transverse energy ($\slashed{E}_T$) when the DM particle is resonantly produced from the decay of a heavy Higgs field, along with multiple jets from Initial State Radiation (ISR). Thus, the ensuing $\slashed{E}_T$ + $n\, {\rm jets}~(n \geq 1)$ signature is an excellent probe of DM in this construct.