2019/08/31 by Duarte Fontes, Jorge C. Romão, Jorge C. Romao +2 · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Electroweak interaction #Gauge boson #Higgs boson #Higgs mechanism #Lepton #Neutrino Physics Research #Particle physics theoretical and experimental studies #Seesaw mechanism #Seesaw molecular geometry #Symmetry breaking #Technicolor #hep-ph
paper · pdf · doi:10.1007/jhep10(2019)245
28 pages, 15 Figures in PDF. v2: version matching published version on JHEP. References added
openalex created_date 2019/08/29 · openalex publication_date 2019/10/01 · arxiv created 2019/10/21 · arxiv updated 2020/01/08 · openalex updated_date 2026/08/05
A bstract We examine the simplest realization of the linear seesaw mechanism within the Standard Model gauge structure. Besides the standard scalar doublet, there are two lepton-number-carrying scalars, a nearly inert SU(2) L doublet and a singlet. Neutrino masses result from the spontaneous violation of lepton number, implying the existence of a Nambu-Goldstone boson. Such “majoron” would be copiously produced in stars, leading to stringent astrophysical constraints. We study the profile of the Higgs bosons in this model, including their effective couplings to the vector bosons and their invisible decay branching ratios. A consistent electroweak symmetry breaking pattern emerges with a compressed spectrum of scalars in which the “Standard Model” Higgs boson can have a sizeable invisible decay into the invisible majorons.