2015/12/31 by Jihn E. Kim · 40 citations
Physics and Astronomy · #Axion #Branching fraction #Dark Matter and Cosmic Phenomena #Dark matter #Electron #Gauge (firearms) #Gluon #Higgs boson #High-Energy Particle Collisions Research #Lepton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum mechanics #Quark #Resonance (particle physics) #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1016/j.physletb.2016.02.016
published in Physics Letters B 755, 190-195 (Elsevier BV) · 9 pages of latex file with 3 figures
arxiv created 2016/02/06 · openalex publication_date 2016/02/10 · arxiv updated 2016/02/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Heavy axion-like particles, called axizillas, are simple extensions of the standard model (SM). An axizilla is required not to couple to the quarks, leptons , and Brout–Englert–Higgs doublets of the SM, but couple to the gauge anomalies of the W ± , Z and photon. It is possible to have its branching ratios (BRs) to two photons greater than 10 % and to two Z 's less than 10 %. To have a (production cross section) ⋅ (BR to di-photons) at a 10 − 38 cm 2 level, a TeV scale heavy quark Q is required for the gluon–quark fusion process. The decay of Q to axizilla plus quark, and the subsequent decay of the axizilla to two photons can be fitted at the required level of 10 − 38 cm 2 .