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Prima Facie Evidence against Spin-Two Higgs Impostors

Research output: Contribution to journalArticlepeer-review

John Ellis, Verónica Sanz, Tevong You

Original languageEnglish
Article numberN/A
Pages (from-to)244-250
Number of pages7
JournalPhysics Letters B
Issue number1-3
Early online date9 Aug 2013
E-pub ahead of print9 Aug 2013
Published7 Oct 2013


King's Authors


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. The data also disfavour universal couplings to pairs of photons and gluons, which would be predicted in a large class of graviton-like models.

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