Scalar Resonances near 650 and 95 GeV in the GNMSSM with Correct Dark Matter Relic Abundance

TL;DR

This paper interprets recent collider anomalies as signals of scalar resonances near 650 and 95 GeV within the GNMSSM, consistent with dark matter constraints and offering testable predictions for future experiments.

Contribution

It presents a unified GNMSSM-based explanation for multiple collider excesses involving light scalars and dark matter, aligning with current experimental constraints.

Findings

The model explains the anomalies at 2σ level.

Dark matter relic density is achieved via funnel annihilation or coannihilation.

Predictions for testing at HL-LHC and future colliders.

Abstract

Recent CMS analyses report an excess in the diphoton-plus-$b \bar{b}$ channel, indicative of a heavy resonance around 650 GeV decaying into a Standard Model (SM)-like Higgs boson and a lighter scalar near 95 GeV. The case for a 95 GeV state is further supported by diphoton excesses observed by both CMS and ATLAS, as well as a $b\bar{b}$ excess previously observed at the Large Electron-Position collider. This study presents a unified interpretation of these anomalies within the framework of the General Next-to-Minimal Supersymmetric Standard Model that naturally accommodates a light singlet-dominated $CP$-even scalar boson $h_s$ near 95 GeV and a heavier doublet-like scalar boson $A_H$ near 650 GeV. Through a comprehensive scan of the parameter space, we demonstrate that the model can explain these excesses at $2\,\sigma$ level while satisfying constraints from the dark matter relic density, direct detection experiments, the properties of the 125 GeV Higgs boson, $B$-physics observables, and searches for electroweakinos at the Large Hadron Collider (LHC). The interpretation features a Bino-dominated lightest neutralino as the dark matter candidate, whose relic abundance is achieved primarily via $A_s$ funnel annihilation or coannihilation with $\tilde{S}$-like $\tilde{\chi}^0_2$s into $h_sA_H$ final states. Our findings provide clear predictions for testing this scenario at the high-luminosity LHC and future colliders.