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2012

Prima Facie Evidence against Spin-Two Higgs Impostors

Ellis, John, Sanz, Veronica, You, Tevong

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The new particle X recently discovered by the ATLAS and CMS Collaborations is widely expected to have spin zero, but this remains to be determined.

The leading alternative is that X has spin two, presumably with graviton-like couplings.
We show that measurements of the X particle to pairs of vector bosons constrain such scenarios.
In particular, a graviton-like Higgs impostor in scenarios with a warped extra dimension of AdS type is prima facie excluded, principally because they predict too small a ratio between the X couplings to WW and ZZ, compared with that to photons.

Prima Facie Evidence against Spin-Two Higgs Impostors · Around

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For other analyses of the X X particle couplings, see also: D. Carmi, A. Falkowski, E. Kuflik and T. Volanski, arXiv:1202.3144 [hep-ph]; A. Azatov, R. Contino and J. Galloway, JHEP 1204
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