2015/10/31 by Johann Brehmer, A. Freitas, Ayres Freitas +3 · 2 citations
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Dimension (graph theory) #Distributed and Parallel Computing Systems #Extension (predicate logic) #Hierarchy #Hierarchy problem #Higgs boson #Higgs sector #High-Energy Particle Collisions Research #Kinematics #Large Hadron Collider #Mathematics #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Pure mathematics #Quantum mechanics #Standard Model (mathematical formulation) #Theoretical physics #hep-ph
paper · pdf · doi:10.1103/physrevd.93.075014
published as Phys. Rev. D 93, 075014 (2016) · 30 pages plus detailed appendices; v2: expanded discussion of matching procedure, new results added
arxiv created 2016/01/27 · openalex publication_date 2016/04/06 · arxiv updated 2016/04/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
At the LHC, an effective theory of the Higgs sector allows us to analyze kinematic distributions in addition to inclusive rates, although there is no clear hierarchy of scales. We systematically analyze how well dimension-6 operators describe LHC observables in comparison to the full theory, and in a range where the LHC will be sensitive. The key question is how the breakdown of the dimension-6 description affects Higgs measurements during the upcoming LHC run for weakly interacting models. We cover modified Higgs sectors with a singlet and doublet extension, new top partners, and a vector triplet. First, weakly interacting models only generate small relevant subsets of dimension-6 operators. Second, the dimension-6 description tends to be justified at the LHC. Scanning over model parameters, significant discrepancies can nevertheless arise; their main source is the matching procedure in the absence of a well-defined hierarchy of scales. While these issues require vigilance, they should not present a major problem for future LHC analyses.