125 GeV Higgs Boson signal within the complex NMSSM

TL;DR

This paper investigates the CP-violating Next-to-Minimal Supersymmetric Standard Model to see if it can explain the observed 125 GeV Higgs boson, focusing on the effects of complex phases on Higgs properties and decay channels.

Contribution

It identifies specific model configurations with CP violation that align with LHC Higgs observations and analyzes the impact of CP-violating phases on Higgs mass and diphoton decay.

Findings

CP-violating phases significantly affect Higgs mass predictions

Certain model configurations match LHC Higgs data

Explicit phases influence diphoton decay rates

Abstract

While the properties of the 125 GeV Higgs boson-like particle observed by the ATLAS and CMS collaborations are largely compatible with those predicted for the Standard Model state, significant deviations are present in some cases. We, therefore, test the viability of a Beyond the Standard Model scenario based on Supersymmetry, the CP-violating Next-to-Minimal Supersymmetric Standard Model, against the corresponding experimental observations. Namely, we identify possible model configurations in which one of its Higgs bosons is consistent with the LHC observation and evaluate the role of the explicit complex phases in both the mass and diphoton decay of such a Higgs boson. Through a detailed analysis of some benchmark points corresponding to each of these configurations, we highlight the impact of the CP-violating phases on the model predictions compared to the CP-conserving case.