Université de GenèveDépartement de Physique ThéoriqueCAP Genève

Complementarity of DM Searches in a Consistent Simplified Model: the Case of Z'

24. May 2016
Cite as: 
Thomas Jacques, Andrey Katz, Enrico Morgante, Davide Racco, Mohamed Rameez, Antonio Riotto [arXiv:1605.06513]

We analyze the constraints from direct and indirect detection on fermionic  Majorana Dark Matter (DM). Because the interaction with the Standard Model (SM) particles is spin-dependent, a priori the constraints that one gets from  neutrino telescopes, the LHC and direct detection experiments are comparable. We study the complementarity of these searches in a particular example, in which a heavy Z' mediates the interactions between the SM and the DM. We find that in most cases IceCube provides the strongest bounds on this scenario, while the LHC constraints are only meaningful for smaller dark matter masses.  These light masses  are less motivated by thermal relic abundance considerations. We show that the dominant annihilation channels of the light DM in the Sun are either $b \bar b$ or $t \bar t$, while the heavy  DM annihilation is completely dominated by Zh channel. The latter produces a hard neutrino spectrum which has not been previously analyzed. We study the neutrino spectrum yielded by DM and recast  IceCube constraints to allow proper comparison with constraints from direct detection experiments and LHC exclusions.


Département de Physique Théorique
Université de Genève
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