Regular Article - Theoretical Physics
Theoretical Physics Department, Fermilab, Batavia, IL, 60510, USA
* e-mail: email@example.com
Accepted: 2 October 2017
Published online: 24 October 2017
We study models that produce a Higgs boson plus photon () resonance at the LHC. When the resonance is a boson, decays to occur at one loop. If the boson couples at tree level to quarks, then the branching fraction is typically of order or smaller. Nevertheless, there are models that would allow the observation of at TeV with a cross section times branching fraction larger than 1 fb for a mass in the 200–450 GeV range, and larger than 0.1 fb for a mass up to 800 GeV. The one-loop decay of the into lepton pairs competes with , even if the couplings to leptons vanish at tree level. We also present a model in which a boson decays into a Higgs boson and a pair of collimated photons, mimicking an resonance. In this model, the resonance search would be the discovery mode for a as heavy as 2 TeV. When the resonance is a scalar, although decay to is forbidden by angular momentum conservation, the plus collimated photons channel is allowed. We comment on prospects of observing an resonance through different Higgs decays, on constraints from related searches, and on models where is replaced by a nonstandard Higgs boson.
© The Author(s), 2017