The mass-degenerate SM-like Higgs and anomaly of $(g-2)_\mu$ in $\mu$-term extended NMSSM

TL;DR

This paper investigates the $mbda$-term extended NMSSM, demonstrating that a scenario with two mass-degenerate SM-like Higgs bosons can explain the $(g-2)_mu$ anomaly while satisfying current experimental constraints.

Contribution

It introduces a novel scenario with mass-degenerate Higgs bosons in the $mbda$NMSSM that can account for the $(g-2)_mu$ anomaly and align with experimental data.

Findings

The $(g-2)_mu$ anomaly can be explained by two mass-degenerate SM-like Higgs bosons.

Samples exist that satisfy all current experimental constraints.

The scenario outperforms the Standard Model in fitting Higgs data.

Abstract

We chose the $\mu$-term extended next-to-minimal supersymmetric standard model ($\mu$NMSSM) for this work, and the phenomenological research is based on the assumption of double Higgs resonance state as the Standard Model (SM)-like Higgs considering the recent $(g-2)_\mu$ result. The study also take into account a variety of experimental results, including direct detection of dark matter (DM) and searching results for sparticles at the Large Hadron Collider (LHC). We study the characteristic of DM confronted with limitations of direct detection experiments. Following that, we concentrate on the properties of the mass-degenerate SM-like Higgs bosons and explaining the anomaly of $(g-2)_\mu$. We conclude that the anomaly of $(g-2)_\mu$ can be explained in the scenario with two mass-degenerate SM-like Higgs, and there are samples that meet all current constraints and outperform SM in fitting Higgs data.