Hooman Davoudiasl, Hye-Sung Lee, William J. Marciano
We propose that the LHC hints for a Higgs diphoton excess and the muon g-2 anomaly may be related by vector-like "leptons" charged under both U(1)_Y hypercharge and a "dark" U(1)_d. Quantum loops of such leptons can enhance the Higgs diphoton rate and also generically lead to U(1)_Y - U(1)_d kinetic mixing. The induced coupling of a ~ 10-100 MeV U(1)_d gauge boson Z_d to electric charge can naturally explain the measured g_mu-2. We predict new Higgs decay channels gamma Z_d and Z_d Z_d, with rates below the diphoton mode but potentially observable. The boosted Z_d in these decays would mimic a promptly converted photon and could provide a fraction of the apparent diphoton excess. More statistics or a closer inspection of extant data may reveal such events.
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http://arxiv.org/abs/1208.2973
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