Connection of gamma rays, dark matter, and Higgs boson searches at the LHC

Motivated by the upcoming Higgs analyses, we investigate the importance of the complementarity of the Higgs boson chase on the low-mass weakly interacting massive particle (WIMP) search in direct detection experiments and the gamma-ray emission from the Galactic Center measured by the Fermi-LAT telescope in the context of the SU(3)(c) circle times SU(3)(L) circle times U(1)(N). We obtain the relic abundance, thermal cross section, and the WIMP-nucleon cross section in the low-mass regime and network them with the branching ratios (BRs) of the Higgs boson in the model. We conclude that the Higgs boson search has a profound connection to the dark matter problem in our model, in particular for the case that (M-WIMP < 60 GeV) the BR(H -> 2 WIMPs) greater than or similar to 90%. This scenario could explain the gamma-ray emission from the Galactic Center observed by the Fermi-LAT telescope through the b<(b)over bar> channel with a WIMP in the mass range of 25-45 GeV, while still being consistent with the current limits from XENON100 and CDMSII. However, after the recent LHC measurements concerning the Higgs, this window has been completely forfended, implying that M-WIMP > M-H/2 and, consequently, ruling out any attempt to explain the Fermi-LAT observations, although still offering a region of the parameter space consistent with the current bounds. Lastly, we show that our model has a Standard Model-like Higgs boson for the regime that M-WIMP > M-H/2, by computing the BRs into bb, gamma gamma and tau tau.