Does $H\to \gamma \gamma$ Taste like vanilla New Physics?

Abstract

We analyse the interplay between the Higgs to diphoton rate and electroweak precision measurements contraints in extensions of the Standard Model with new uncolored charged fermions that do not mix with the ordinary ones. We also compute the pair production cross sections for the lightest fermion and compare them with current bounds.

19 pgs, 10 figures, typos fixed, reference added, small improvements made

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• Higgs After the Discovery: A Status Report
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• Combined search for the Standard Model Higgs boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
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• Diphotons from Tetraphotons in the Decay of a 125 GeV Higgs at the LHC

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