2016/02/29 by Luis Aparicio, Aleksandr Azatov, Edward Hardy +1 · 23 citations
Physics and Astronomy · #Axion #Boson #Dark Matter and Cosmic Phenomena #Fermion #Higgs boson #High-Energy Particle Collisions Research #Particle decay #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Scalar (mathematics) #hep-ph
paper · pdf · doi:10.1007/jhep05(2016)077
published in Journal of High Energy Physics 2016(5) (Springer Nature) · 21 pages, 6 figures
openalex publication_date 2016/05/01 · arxiv created 2016/05/26 · arxiv updated 2016/06/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study models in which the 750 GeV diphoton excess is due to a scalar decaying to two pseudo-Nambu-Goldstone bosons that subsequently decay into two pairs of highly boosted photons, misidentified as individual photons. Performing a model independent analysis we find that, with axion mass around 200 MeV, this class of theories can naturally explain the observed signal with a large width, without violating monojet constraints. At the same time the requirement of a prompt axion decay can be satisfied only with a relatively large axion-photon coupling, leading to many new charged particles at the TeV scale. However, the required multiplicities of such fields is still moderately reduced relative to models with direct diphoton production.