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arXiv · 1105.4587

Singlet scalars as Higgs imposters at the Large Hadron Collider

Ian Low·Joseph Lykken·Gabe Shaughnessy
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Abstract

An electroweak singlet scalar can couple to pairs of vector bosons through loop-induced dimension five operators. Compared to a Standard Model Higgs boson, the singlet decay widths in the diphotons and Z gamma channels are generically enhanced, while decays into massive final states like WW and ZZ are kinematically disfavored. The overall event rates into gamma gamma and Z gamma can exceed the Standard Model expectations by orders of magnitude. Such a singlet may appear as a resonant signal in the gamma gamma and Z gamma channels, even with a mass above the WW kinematic threshold.

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Ian Low, Joseph Lykken, Gabe Shaughnessy. 2011-05-23. Singlet scalars as Higgs imposters at the Large Hadron Collider. https://doi.org/10.1103/physrevd.84.035027

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