2013/03/31 by Kevin Earl, Katy Hartling, Heather E. Logan +1 · 49 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electroweak interaction #Higgs boson #Mathematical physics #Multiplet #Particle physics #Particle physics theoretical and experimental studies #Physics #Planck #Quantum mechanics #Scalar (mathematics) #Spectral line #Symmetry (geometry) #Theoretical physics #hep-ph
paper · pdf · doi:10.1103/physrevd.88.015002
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 88(1) (American Physical Society) · 20 pages, 5 figures. Additional constraints from Higgs decay, typos corrected in Eqs. 26 and A3, refs added, version accepted by PRD
openalex publication_date 2013/07/02 · arxiv created 2013/07/16 · arxiv updated 2013/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Models in which the Higgs sector is extended by a single electroweak scalar multiplet X can possess an accidental global U(1) symmetry at the renormalizable level if X has isospin T\ensuremath≥2. We show that all such models with an accidental U(1) symmetry are excluded by the interplay of the cosmological relic density of the lightest (neutral) component of X and its direct-detection cross section via Z exchange. The sole exception is the T=2 multiplet, whose lightest member decays on a few-day to few-year time scale via a Planck-suppressed dimension-5 operator.