2013/10/31 by Marco Farina, Maxim Perelstein, Bibhushan Shakya · 2 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Coupling (piping) #Higgs boson #Lambda #Large Hadron Collider #Mathematics #Minimal Supersymmetric Standard Model #Naturalness #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Standard Model (mathematical formulation) #Supersymmetry #hep-ph
paper · pdf · doi:10.1007/jhep04(2014)108
24 pages, 8 figures. v2: references added
arxiv created 2013/11/06 · openalex publication_date 2014/04/01 · arxiv updated 2015/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We study Higgs boson couplings in the large-λ version of the Next-to-Minimal Supersymmetric Standard Model, known as λ-SUSY. We find that the predicted deviations from the Standard Model (SM) in these couplings are inversely correlated with the amount of fine-tuning needed to accommodate a 126 GeV Higgs. In the most natural regions of parameter space, the 126 GeV Higgs has large admixtures of both the SM-singlet and the non-SM Higgs doublet scalars, and such regions are already ruled out by the LHC. Future improvements in the Higgs coupling measurements will either discover deviations from the SM, or put further stress on naturalness in λ-SUSY. We present projections for future experiments and find that HL-LHC and the proposed e + e − Higgs factories can explore regions of parameter space that are fine-tuned at the level of up to 0.1%.