2015/03/31 by K. Endo, Kazuhiro Endo, Y. Sumino +1 · 1 citation
Physics and Astronomy · #Electroweak interaction #Electroweak scale #Higgs boson #Higgs field #Higgs mechanism #Higgs sector #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Standard Model (mathematical formulation) #Technicolor #hep-ph
paper · pdf · doi:10.1007/jhep05(2015)030
published as JHEP 1505, 030 (2015) · 26 pages, 14 figures, minor modification, version to appear in JHEP
openalex publication_date 2015/05/01 · arxiv created 2015/05/07 · openalex created_date 2016/06/24 · arxiv updated 2016/11/01 · openalex updated_date 2026/08/05
In view of the current status of measured Higgs boson properties, we consider a question whether only the Higgs self-interactions can deviate significantly from the Standard-Model (SM) predictions. This may be possible if the Higgs effective potential is irregular at the origin. As an example we investigate an extended Higgs sector with singlet scalar(s) and classical scale invariance. We develop a perturbative formulation necessary to analyze this model in detail. The behavior of a phenomenologically valid potential in the perturbative regime is studied around the electroweak scale. We reproduce known results: the Higgs self-interactions are substantially stronger than the SM predictions, while the Higgs interactions with other SM particles are barely changed. We further predict that the interactions of singlet scalar(s), which is a few to several times heavier than the Higgs boson, tend to be fairly strong. If probed, these features will provide vivid clues to the structure of the vacuum. We also examine Veltman’s condition for the Higgs boson mass.