On the connection of Gamma-rays, Dark Matter and Higgs searches at LHC

TL;DR

This paper explores the link between Higgs boson searches, gamma-ray signals from the Galactic Center, and low-mass WIMP dark matter within an extended gauge model, highlighting how Higgs decay channels relate to dark matter detection.

Contribution

It demonstrates the connection between Higgs decay modes and dark matter signals, especially for WIMPs below 60 GeV, within an $SU(3)_c imes SU(3)_L imes U(1)_N$ model.

Findings

Higgs decay to WIMPs can be over 90% for WIMP masses below 60 GeV.

The gamma-ray emission from the Galactic Center can be explained by WIMPs in the 25-45 GeV range.

Current experimental limits are consistent with the proposed WIMP mass range.

Abstract

Motivated by the upcoming Higgs analyzes we investigate the importance of the complementarity of the Higgs boson chase on the low mass 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 $SU(3)_c\otimes SU(3)_L\otimes U(1)_N$. We obtain the relic abundance, thermal cross section, the WIMP-nucleon cross section in the low mass regime and network them with the branching ratios 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($H \rightarrow 2$ WIMPs) $\gtrsim 90%$. This scenario could explain this plateau of any mild excess regarding the Higgs search as well as explain the gamma-ray emission from the galactic center through the $b\bar{b}$ 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, if the recent modest excesses measured at LHC and TEVATRON are confirmed and consistent with a standard model Higgs boson this would imply that $ M_{WIMP} > 60 $ GeV, consequently ruling out any attempt to explain the Fermi-LAT observations.