Phenomenology of a 750 GeV singlet
By A. Falkowski, O. Slone, T. Volansky. 2015
173 citations recorded by the source corpus.
A bstractWe study the recently reported excess in the diphoton resonance search by ATLAS and CMS. We investigate the available parameter space in the combined run-1 and run-2 diphoton data and study its interpretation in terms of a singlet scalar field which possibly mixes with the Standard Model Higgs boson. We show that the mixing angle is already strongly constrained by high-mass Higgs searches in the diboson channel, and by Higgs coupling measurements. While a broad resonance is slightly favored, we argue that the signal is consistent with a narrow-width singlet which couples to colored and electromagnetically-charged vector-like fermions. Dijet signals are predicted and may be visible in upcoming analyses. Allowing for additional decay modes could explain a broader resonance, however, we show that monojet searches disfavor a large invisible width. Finally, we comment on the possible relation of this scenario to the naturalness problem.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/5856a054c1dfc4ac59d96ef12f6468daa37404a5
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In Nuclear and High Energy Physics
Citations in the corpus
- Building and testing models with extended Higgs sectors (2017, background): “The enhancement appeared to originate from production and decay of a neutral scalar, and models with singlet extensions were among the first summoned to explain the anomaly, see for instance [384, 385] to get the impression.”