Study of diphoton decays of the lightest scalar Higgs boson in the Next-to-Minimal Supersymmetric Standard Model

Abstract

The CMS and ATLAS experiments at the LHC have announced the discovery of a Higgs boson with mass at approximately 125 $GeV/c^2$ in the search for the Standard Model Higgs boson via notably the $\gamma \gamma$ and $ZZ$ to four leptons final states. Considering the recent results on the Higgs boson searches from the LHC, we study the lightest scalar Higgs boson $h_1$ in the Next-to-Minimal Supersymmetric Standard Model by restricting the next-to-lightest scalar Higgs boson $h_2$ to be the observed 125 $GeV/c^2$ state. We perform a scan over the relevant NMSSM parameter space that is favoured by low fine-tuning considerations. Moreover, we also take the experimental constraints from direct searches, $B$-physics observables, relic density and anomalous magnetic moment of the muon measurements as well as the theoretical considerations into account in our specific scan. We find that the signal rate in the two-photon final state for the NMSSM Higgs boson $h_1$ with the mass range from approximately 80 $GeV/c^2$ to 122 $GeV/c^2$ can be enhanced by a factor up to 3.5, when the Higgs boson $h_2$ is required to be compatible with the excess from latest LHC results. This motivates the extension of the search at the LHC for the Higgs boson $h_1$ in the diphoton final state down to masses of 80 $GeV/c^2$ or lower, in particular with the upcoming proton-proton collision data to be taken at center-of-mass energies of 13-14 $TeV$.

In addition to increasing scan statistics, for this version, after discussion with theorists, we used modified parameter ranges especially a relaxed range for lambda (0.60-0.75) and relaxed HiggsSignals constraints (~2 sigmas)

References in corpus (8)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Global fit to Higgs signal strengths and couplings and implications for extended Higgs sectors
• The Muon Magnetic Moment and Supersymmetry
• Updated Constraints from B Physics on the MSSM and the NMSSM
• Constraining extended Higgs sectors with HiggsSignals

Cited by in corpus (11)

• The diphoton signal of the light Higgs boson in Natural NMSSM
• Search for a standard model-like Higgs boson in the mass range between 70 and 110 GeV in the diphoton final state in proton-proton collisions at $\sqrt{s}=$ 8 and 13 TeV
• Discovery Prospects for NMSSM Higgs Bosons at the High-Energy Large Hadron Collider
• Discovery Prospects of a Light Scalar in the NMSSM
• NMSSM interpretations of the observed Higgs signal
• On-Shell neutral Higgs bosons in the NMSSM with complex parameters
• Light Higgs Bosons in NMSSM at the LHC
• Next-to-Leading Order NMSSM Decays with CP-odd Higgs Bosons and Stops
• Search for a lighter neutral custodial fiveplet scalar in the Georgi-Machacek model
• Predictions for the isolated prompt photon production at the LHC at $\sqrt{s}=$13 TeV
• Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV