2018/11/30 by Luigi Delle Rose, Shaaban Khalil, Simon J. D. King +2 · 42 citations
Physics and Astronomy · #Anomaly (physics) #Context (archaeology) #Dark Matter and Cosmic Phenomena #Geology #Higgs boson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scale invariance #hep-ph
paper · pdf · doi:10.1103/physrevd.99.055022
published in Physical review. D/Physical review. D. 99(5) (American Physical Society) · 7 pages, 2 figures
openalex created_date 2018/11/29 · arxiv created 2018/12/11 · openalex publication_date 2019/03/18 · arxiv updated 2019/03/27 · openalex updated_date 2026/08/05
In the context of a gauge invariant, nonanomalous, and family-dependent (nonuniversal) U(1)^\ensuremath' extension of the Standard Model, wherein a new high-scale mechanism generates masses and couplings for the first two fermion generations and the standard Higgs mechanism does so for the third one, we find solutions to the anomaly observed by the Atomki Collaboration in the decay of excited states of beryllium, in the form of a very light Z^\ensuremath' state, stemming from the U(1)^\ensuremath' symmetry breaking, with significant axial couplings so as to evade a variety of low-scale experimental constraints.