Loop induced decays of the Little Higgs: H --> gg, gamma gamma

Details Loop induced decays of the Little Higgs: H --> gg, gamma gamma Loop induced decays of the Little Higgs: H --> gg, gamma gamma

2003-02-20

arxiv.org/abs/hep-ph/0302188v3

Phys.Lett. B563 (2003) 191-202; Erratum-ibid. B603 (2004) 257-259

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 7 figures; v2: note added to comment on a related paper, submitted to PLB; v3: mistake corrected in yt, yT and yWL i

Scientific paper

10.1016/S0370-2693(03)00657-9

We analyze the loop induced decays of the Higgs boson into pairs of gluons and photons in the Littlest Higgs model. We find that the deviation of the partial widths for these decays relative to their Standard Model values scales with 1/f^2, where f ~ TeV is the mass scale of the new heavy particles in the model. For f = 1 TeV, Gamma(H -> gg) is reduced by 6-10% and Gamma(H -> gamma gamma) is reduced by 5-7% compared to their Standard Model values. While the LHC and a linear e+e- collider would be sensitive to these deviations only for relatively low values of f <~ 650 GeV, a photon collider could probe the deviation in Gamma(H -> gamma gamma) up to f <~ 1.1 (0.7) TeV at the 2 (5) sigma level.

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