CERN Accelerating science

Annihilation cross sections of the pure WIMP 3plet (left) and the pure WIMP 5plet (right), including the Sommerfeld enhancement.

95\% C.L. exclusion limits on the velocity weighted cross section for DM self-annihilation into $\gamma\gamma$ as a function of $M_{\rm DM}$ for Fornax, Carina, Coma Berenices, Sculptor and Sagittarius dSphs.

95\% C.L. exclusion limits on the total velocity-weighted annihilation cross section of the pure WIMP 3plet (left) and pure WIMP 5plet (right), as a function of the DM mass, using the full gamma-ray spectrum from these candidates. The predicted thermal mass of the candidate is indicated by a blue vertical band. The red boxes in the lower part of the plots indicate the areas in which the predicted cross section (gray dashed line) overshoots the combined limit (black thick line) and therefore the model is excluded. The shaded area at small DM masses is ruled out by disappearing track searches at the LHC.

Gamma-ray spectra from pure WIMP 3plet (left) and pure WIMP 5plet (right) annihilations. Different masses have been considered and, for illustration, plotted with or without an indicative energy smearing of 15\% due to finite energy resolution.

Gamma-ray spectra from pure WIMP 3plet (left) and pure WIMP 5plet (right) annihilations. Different masses have been considered and, for illustration, plotted with or without an indicative energy smearing of 15\% due to finite energy resolution.

Illustration of the tree-level diagram and a 1-loop diagram relevant for annihilation signals in `pure WIMP' models.

Annihilation cross sections of the pure WIMP 3plet (left) and the pure WIMP 5plet (right), including the Sommerfeld enhancement.

95\% C.L. exclusion limits on the total velocity-weighted annihilation cross section of the pure WIMP 3plet (left) and pure WIMP 5plet (right), as a function of the DM mass, using the full gamma-ray spectrum from these candidates. The predicted thermal mass of the candidate is indicated by a blue vertical band. The red boxes in the lower part of the plots indicate the areas in which the predicted cross section (gray dashed line) overshoots the combined limit (black thick line) and therefore the model is excluded. The shaded area at small DM masses is ruled out by disappearing track searches at the LHC.

Upper limits at 95\% C.L. on the integrated flux as a function of photon energy $E_\gamma$ for Fornax, Carina, Coma Berenices, Sculptor and Sagittarius dSphs. The dots correspond to the discrete values of photon energy which are actually tested.

Illustration of the tree-level diagram and a 1-loop diagram relevant for annihilation signals in `pure WIMP' models.

{\em Left:} comparison of the limits on DM annihilation into mono-energetic gamma rays from different experiments. The H.E.S.S.~limits differ from those in Fig~\ref{fig:linelimits} since the $J$-factor nuisance is suppressed here for the purposes of this comparison. {\em Right:} limits on the annihilation cross section of the pure WIMP 3plet, computed in three different ways and rescaled by the corresponding branching ratios: the limit computed using only the line-like emission is rescaled by the BR($\gamma\gamma + \gamma Z/2$) (orange line); the limit computed using only the continuum gamma-ray emission from electroweak showering and gauge boson decays is rescaled by BR($WW + ZZ + \gamma Z/2$) (purple line); the limit using the full spectrum (black).

{\em Left:} comparison of the limits on DM annihilation into mono-energetic gamma rays from different experiments. The H.E.S.S.~limits differ from those in Fig~\ref{fig:linelimits} since the $J$-factor nuisance is suppressed here for the purposes of this comparison. {\em Right:} limits on the annihilation cross section of the pure WIMP 3plet, computed in three different ways and rescaled by the corresponding branching ratios: the limit computed using only the line-like emission is rescaled by the BR($\gamma\gamma + \gamma Z/2$) (orange line); the limit computed using only the continuum gamma-ray emission from electroweak showering and gauge boson decays is rescaled by BR($WW + ZZ + \gamma Z/2$) (purple line); the limit using the full spectrum (black).