2017/04/30 by Luca Di Luzio, Luca Di Luzio, Ramona Gröber +1
Physics and Astronomy · Social Sciences · #Coupling (piping) #Electroweak interaction #False vacuum #Focus (optics) #Higgs boson #International Science and Diplomacy #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Stability (learning theory) #Standard Model (mathematical formulation) #Vacuum expectation value #hep-ex #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-5361-0
36 pages, 9 figures, to appear in EPJC
openalex created_date 2017/05/19 · arxiv created 2017/11/01 · openalex publication_date 2017/11/01 · arxiv updated 2017/12/06 · openalex updated_date 2026/08/06
In order to answer the question on how much the trilinear Higgs self-coupling could deviate from its Standard Model value in weakly coupled models, we study both theoretical and phenomenological constraints. As a first step, we discuss this question by modifying the Standard Model using effective operators. Considering constraints from vacuum stability and perturbativity, we show that only the latter can be reliably assessed in a model-independent way. We then focus on UV models which receive constraints from Higgs coupling measurements, electroweak precision tests, vacuum stability and perturbativity. We find that the interplay of current measurements with perturbativity already excludes self-coupling modifications above a factor of a few with respect to the Standard Model value.