Diphoton Signal of light pseudoscalar in NMSSM at the LHC

Abstract

We explore the detection possibility of light pseudoscalar Higgs boson in the next-to-minimal supersymmetric Standard Model(NMSSM) at the LHC with the center of mass energy, $\sqrt{S}=13$ TeV. We focus on the parameter space which provides one of the Higgs boson as the SM-like with a mass of 125 GeV and some of the non-SM-like Higgs bosons can be light having suppressed couplings with fermions and gauge bosons due to their singlet nature. It is observed that for certain region of model parameter space, the singlet like light pseudoscalar can decay to di-photon($\gamma \gamma$) channel with a substantial branching ratio. In this study, we consider this di-photon signal of light pseudoscalar Higgs boson producing it through the chargino-neutralino production and the subsequent decay of neutralino. We consider signal consisting of two photons plus missing energy along with a lepton from the chargino decay. Performing a detailed simulation of the signal and backgrounds including detector effects, we present results for a few benchmark points corresponding to the pseudoscalar Higgs boson mass in the range 60 -100 GeV. Our studies indicate that some of the benchmark points in the parameter space can be probed with a reasonable significance for 100 fb${}^{-1}$ integrated luminosity. We also conclude that exploiting this channel it is possible to distinguish the NMSSM from the other supersymmetric models.

28pp, text edited and typos are corrected, references are added

References in corpus (16)

• 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
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• New parton distributions for collider physics
• The NMSSM Solution to the Fine-Tuning Problem, Precision Electroweak Constraints and the Largest LEP Higgs Event Excess
• The 125 GeV Higgs in the NMSSM in light of LHC results and astrophysics constraints
• Discovery Prospects for NMSSM Higgs Bosons at the High-Energy Large Hadron Collider
• Search for direct pair production of a chargino and a neutralino decaying to the 125 GeV Higgs boson in $\sqrt{s}$ = 8 TeV pp collisions with the ATLAS detector
• Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at sqrt(s) = 7 TeV
• LHC discovery potential of the lightest NMSSM Higgs in the h1 -> a1 a1 -> 4 muons channel
• A light NMSSM pseudoscalar Higgs boson at the LHC redux
• Di-photon Higgs signals at the LHC in the Next-to-Minimal Supersymmetric Standard Model
• The Scope of the 4 tau Channel in Higgs-strahlung and Vector Boson Fusion for the NMSSM No-Lose Theorem at the LHC
• Uncovering light scalars with exotic Higgs decays to bbmumu
• NMSSM Higgs Discovery at the LHC

Cited by in corpus (3)

• On-Shell neutral Higgs bosons in the NMSSM with complex parameters
• Review of a light NMSSM pseudoscalar Higgs state production at the LHC
• Indian Contributions to LHC Theory