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Article
Implications of the LHC two-photon signal for two-Higgs-doublet models
Physical Review D
  • P. M. Ferreira
  • Rui Santos
  • Joao P. Silva
  • Marc Sher, William & Mary
Document Type
Article
Department/Program
Physics
Pub Date
1-1-2012
Abstract

We study the implications for two-Higgs-doublet models of the recent announcement at the LHC giving a tantalizing hint for a Higgs boson of mass 125 GeV decaying into two photons. We require that the experimental result be within a factor of 2 of the theoretical standard model prediction, and analyze the type I and type II models as well as the lepton-specific and flipped models, subject to this requirement. It is assumed that there is no new physics other than two Higgs doublets. In all of the models, we display the allowed region of parameter space taking the recent LHC announcement at face value, and we analyze the W+W-, ZZ, (b) over barb, and tau(+)tau(-) expectations in these allowed regions. Throughout the entire range of parameter space allowed by the gamma gamma constraint, the numbers of events for Higgs decays into WW, ZZ, and b (b) over bar are not changed from the standard model by more than a factor of 2. In contrast, in the lepton-specific model, decays to tau(+)tau(-) are very sensitive across the entire gamma gamma-allowed region.

DOI
10.1103/PhysRevD.85.077703
Citation Information
P. M. Ferreira, Rui Santos, Joao P. Silva and Marc Sher. "Implications of the LHC two-photon signal for two-Higgs-doublet models" Physical Review D Vol. 85 Iss. 7 (2012)
Available at: http://works.bepress.com/marct-sher/3/