2021/04/30 by Damiano Anselmi, Kristjan Kannike, Carlo Marzo +7 · 17 citations
Computer Science · Physics and Astronomy · #Anomalous magnetic dipole moment #Collider #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Degrees of freedom (physics and chemistry) #Electroweak interaction #Electroweak scale #Fermilab #Magnetic moment #Muon #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quadrupole #Quantum mechanics #Scalar (mathematics) #Standard Model (mathematical formulation) #Theoretical physics #hep-ex #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.104.035009
published in Physical review. D/Physical review. D. 104(3) (American Physical Society) · 7 pages, 5 figures, PRD version
openalex publication_date 2021/08/13 · arxiv created 2021/08/25 · arxiv updated 2021/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Extensions to the Standard Model that use strictly off-shell degrees of freedom---the fakeons---allow for new measurable interactions at energy scales usually precluded by the constraints that target the on-shell propagation of new particles. Here we employ the interactions between a new fake scalar doublet and the muon to explain the recent Fermilab measurement of its anomalous magnetic moment. Remarkably, unlike in the case of usual particles, the experimental result can be matched for fakeon masses below the electroweak scale without contradicting the stringent precision data and collider bounds on new light degrees of freedom. Our analysis, therefore, demonstrates that the fakeon approach offers unexpected viable possibilities to model new physics naturally at low scales.