Light Higgs bosons in the general NMSSM

Abstract

Physics beyond the Standard Model (SM) may manifest itself as small deviations from the SM predictions for Higgs signal strengths at 125 GeV. Then, a plausible and interesting possibility is that the Higgs sector is extended and at the weak scale there appears an additional Higgs boson weakly coupled to the SM sector. Combined with the LEP excess in e + e − → Z (h → bb), the diphoton excess around 96 GeV recently reported by CMS may suggest such a possibility. We examine if those LEP and CMS excesses can be explained simultaneously by a singlet-like Higgs boson in the general next-to-minimal supersymmetric Standard Model (NMSSM). Higgs mixing in the NMSSM relies on the singlet coupling to the MSSM Higgs doublets and the higgsino mass parameter, and thus is subject to the constraints on these supersymmetric parameters. We find that the NMSSM can account for both the LEP and CMS excesses at 96 GeV while accommodating the observed 125 GeV SM-like Higgs boson. Interestingly, the required mixing angles constrain the heavy doublet Higgs boson to be heavier than about 500 GeV. We also show that the viable region of mixing parameter space is considerably modified if the higgsino mass parameter is around the weak scale, mainly because of the Higgs coupling to photons induced by the charged higgsinos.

Discussing 125 GeV and 95 GeV excess in light radion model

“…While some of the observations in this paper have already been noted in the previous works [12][13][14][15] and the diphoton excess due to the light scalar has also been discussed in several papers [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], the data used are current, leading to new bounds, and we show that the extension of SM by such a scalar can actually give a better fit to the Higgs signal measurement. We begin our discussion with a short review on the radion in the RS model so that this paper can be read as far as possible independently of the preceding literature.…”

Exploring the phenomenology of weak adjoint scalars in minimal R-symmetric models

“…Indeed, as the weak triplet is effectively decoupled, the CP -even scalar sector of this model closely resembles that of the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Mixing in the Higgs sector of the NMSSM has been well studied, and LHC Higgs measurements favor those scenarios where the 125 GeV state is mostly doublet-like [32][33][34]. Explicitly, our angle θ h is referred to as θ 2 in the referenced literature, and our benchmarks assume the angle θ 1 ∼ 0.…”

Reconciling Higgs physics and pseudo-Nambu-Goldstone dark matter in the S2HDM using a genetic algorithm

“…In contrast, here we will follow the results of ref. [69] obtained in the Next-to 2HDM (N2HDM) and in models with supersymmetry [70][71][72][73][74][75]. It was shown that the presence of a second Higgs doublet in addition to a singlet scalar field allows for an explanation of both collider excesses without having to rely on new charged states that appear in the loops of the loop-induced coupling of the possible Higgs boson at 96 GeV in order to enhance its diphoton rate.…”