Light neutral CP -even Higgs boson within the next-to-minimal supersymmetric standard model at the Large Hadron Electron Collider

Abstract

We analyze the prospects of observing the light CP-even neutral Higgs bosons (h 1 ) in their decays into bb quarks, in the neutral and charged current production processes eh 1 q and νh 1 q at the upcoming LHeC, with √ s ≈ 1.296 TeV. Assuming that the intermediateis Standard Model (SM)-like, we study the Higgs production within the framework of NMSSM. We consider the constraints from Dark-matter, Sparticle masses, and the Higgs boson data. The signal in our analysis can be classified as three jets, with electron (missing energy)coming from the neutral (charged) current interaction. We demand that the number of b-tagged jets in the central rapidity region be greater or equal to two. The remaining jet is tagged in the forward regions. With this forward jet and two b-tagged jets in the central region, we reconstructed three jets invariant masses. Applying some lower limits on these invariant masses turns out to be an essential criterion to enhance the signal-to-background rates, with slightly different sets of kinematical selections in the two different channels. We consider almost all reducible and irreducible SM background processes. We find that the non-SM like Higgs boson, h 1 , would be accessible in some of the NMSSM benchmark points, at approximately 0.4σ (2.5σ) level in the e+3j channel up to Higgs boson masses of 75 GeV and in the E / T +3j channel could be discovered with 1.7σ (2.4σ) level up to Higgs boson masses of 88 GeV with 100 fb −1 of data in a simple cut-based (with optimization) selection. With ten times more data accumulation at the end of the LHeC run and using optimization, one can have 5σ discovery in the electron (missing energy) channel up to 85 (more than 90) GeV.

Can we discover a light singlet-like NMSSM Higgs boson at the LHC?

“…3. In this letter we apply this method, which allows for an efficient scanning of the whole parameter space with a complete coverage, to the light singlet-like Higgs boson and determine the cross sections and branching ratios over the whole parameter space, thus complementing previous studies using methods not guaranteeing complete coverage [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The singlet-like Higgs boson can be the lightest Higgs boson H 1 implying it has a mass below 125 GeV, although scenarios, where the SM-like Higgs boson is the lightest one, are also possible.…”

Neutral and Charged Higgs boson phenomenology at the LHeC and FCC-eh

“…Details of the tools used in our numerical analysis can be found in Refs. [9] and [10], including definition of the kinematic variables below.…”

Search for the \(H \rightarrow W^{+} W^{-}\) Process at the LHeC Experiment

“…As might be expected due to this relative lack of popularity, there are much fewer studies of the physics and technological feasibility of the LHeC and a correspondingly small number of studies of Higgs boson production at the LHeC. Almost all of the existing studies of the LHeC of this kind focus on exotic Higgs decays, BSM physics and BSM Higgs boson signatures [7][8][9][10][11]. In our study, we are instead concerned with probing the limits of the Standard Model and the SM Higgs boson, with the belief that this will give us the best possible clues of the kind of physics which lies beyond the Standard Model.…”