Higgs mass and unified gauge coupling in the NMSSM with Vector Matter

Abstract

We consider the NMSSM extended to include one vector-like family of quarks and leptons. If (some of) these vector-like matter particles, as the Higgs doublets, have Yukawa couplings to the singlet S that exceed unity at about the same scale $\Lambda \lesssim 10^3$ TeV, this gives the order 40 % enhancement of the tree level Higgs boson mass required in the MSSM to reach 125 GeV. It is conceivable that the Yukawa couplings to the singlet S, although naively blowing up close to $\Lambda$, will not spoil gauge coupling unification. In such a case the unified coupling ${\alpha }_X$ could be interestingly led to a value not far from unity, thus providing a possible explanation for the number of generations. The characteristic signal is an enhanced resonant production of neutral spin zero particles at LHC, that could even explain the putative diphoton resonance hinted by the recent LHC data at 750 GeV.

15 pages, 8 figures, 1 table. v2: clarifications added in sections 2 and 3, figures updated, matches published version

References in corpus (12)

• What is the gamma gamma resonance at 750 GeV?
• Phenomenology of a 750 GeV Singlet
• On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
• Supersymmetry without a Light Higgs Boson
• A pseudoscalar decaying to photon pairs in the early LHC Run 2 data
• Knocking on New Physics' door with a Scalar Resonance
• Can the new resonance at LHC be a CP-Odd Higgs boson?
• A SUSY Inspired Simplified Model for the 750 GeV Diphoton Excess
• Goldstones in Diphotons
• 750 GeV Diphoton Resonance from Singlets in an Exceptional Supersymmetric Standard Model
• 750 GeV Diphotons: Implications for Supersymmetric Unification
• The NMSSM lives: with the 750 GeV diphoton excess

Cited by in corpus (6)

• 750 GeV Diphotons: Implications for Supersymmetric Unification II
• Muon g-2 and related phenomenology in constrained vector-like extensions of the MSSM
• Impact of LHC data on muon $g-2$ solutions in vector-like extension of the Constrained MSSM
• Learning from the New Higgs-like Scalar before It Vanishes
• From the 750 GeV Diphoton Resonance to Multilepton Excesses
• Soft Gamma Rays from Heavy WIMPs