# Revisiting singlino dark matter of the natural $Z_3$-symmetric NMSSM in the light of LHC

## TL;DR

This paper investigates the viability of light singlino-like dark matter candidates within the natural $Z_3$-symmetric NMSSM framework, considering constraints from the LHC and dark matter experiments, and identifies conditions under which such scenarios remain plausible.

## Contribution

The study demonstrates how a natural $Z_3$-symmetric NMSSM with light singlino-like dark matter can still be consistent with experimental constraints, using representative benchmark points.

## Key findings

- Light singlino-like LSPs can be viable dark matter candidates.
- Compatibility with LHC and dark matter experiments is challenging but possible.
- Benchmark points illustrate parameter space where naturalness and experimental constraints are satisfied.

## Abstract

Inspired by the fact that relatively small values of the effective higgsino mass parameter of the $Z_3$-symmetric Next-to-Minimal Supersymmetric Standard Model (NMSSM) could render the scenario `natural', we explore the plausibility of having relatively light neutralinos and charginos (the electroweakinos or the ewinos) in such a scenario with a rather light singlino-like Lightest Supersymmetric Particle (LSP), which is a Dark Matter (DM) candidate, and singlet-dominated scalar excitations. By first confirming the indications in the existing literature that finding simultaneous compliance with results from the Large Hadron Collider (LHC) and those from various DM experiments with such light states is, in general, a difficult ask, we proceed to demonstrate, with the help of a few representative benchmark points, how exactly and to what extent could such a highly motivated `natural' setup with a singlino-like DM candidate still remains plausible.