Abstract: 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. © 2016, The Author(s).
|Titolo:||Diphotons from Diaxions|
|Autori:||Aparicio, L.; Azatov, A.; Hardy, E.; Romanino, A.|
|Rivista:||JOURNAL OF HIGH ENERGY PHYSICS|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1007/JHEP05(2016)077|
|Fulltext via DOI:||10.1007/JHEP05(2016)077|
|Appare nelle tipologie:||1.1 Journal article|