Singlet scalars as Higgs imposters at the Large Hadron Collider

Details Singlet scalars as Higgs imposters at the Large Hadron Collider Singlet scalars as Higgs imposters at the Large Hadron Collider

2011-05-23

arxiv.org/abs/1105.4587v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 8 figures and 3 tables

Scientific paper

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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