ATLAS and CMS observe deviations from the expected background in the diphoton invariant mass searches of new resonances around 750 GeV. We show that a simple realization in terms of a new pseudoscalar state can accommodate the observations. The model leads to further footprints that can be soon observed. The new state can be interpreted both as an axion or as a highly natural composite state arising from minimal models of dynamical electroweak (EW) symmetry breaking. We further show how to disentangle the two scenarios. Beyond the possible explanation of the diphoton excess, the results show that it is possible to directly test and constrain composite dynamics via processes stemming from its distinctive topological sector.
Minimal composite dynamics versus axion origin of the diphoton excess / Molinaro, E.; Sannino, F.; Vignaroli, N.. - In: MODERN PHYSICS LETTERS A. - ISSN 0217-7323. - 31:26(2016), p. 1650155. [10.1142/S0217732316501558]
Minimal composite dynamics versus axion origin of the diphoton excess
Sannino F.;
2016
Abstract
ATLAS and CMS observe deviations from the expected background in the diphoton invariant mass searches of new resonances around 750 GeV. We show that a simple realization in terms of a new pseudoscalar state can accommodate the observations. The model leads to further footprints that can be soon observed. The new state can be interpreted both as an axion or as a highly natural composite state arising from minimal models of dynamical electroweak (EW) symmetry breaking. We further show how to disentangle the two scenarios. Beyond the possible explanation of the diphoton excess, the results show that it is possible to directly test and constrain composite dynamics via processes stemming from its distinctive topological sector.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.