Journal
PHYSICAL REVIEW D
Volume 80, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.80.123532
Keywords
-
Funding
- NSF [PHY0854743]
- George A. and Margaret M. Downsbrough Endowment
- Eberly research funds of Penn State
- Le Fonds quebecois de la recherche sur la nature et les technologies
- Division Of Physics
- Direct For Mathematical & Physical Scien [854743] Funding Source: National Science Foundation
Ask authors/readers for more resources
Interpretations of indirect searches for dark matter (DM) require theoretical predictions for the annihilation or decay rates of DM into stable particles of the standard model. These predictions include usually only final states accessible as lowest order tree-level processes, with electromagnetic bremsstrahlung and the loop-suppressed two gamma-ray line as exceptions. We show that this restriction may lead to severely biased results for DM tailored to produce only leptons in final states and with mass in the TeV range. For such models, unavoidable electroweak bremsstrahlung of Z and W-bosons has a significant influence both on the branching ratio and the spectral shape of the final state particles. We work out the consequences for two situations: First, the idealized case where DM annihilates at tree level with 100% branching ratio into neutrinos. For a given cross section, this leads eventually to minimal yields of photons, electrons, positrons, and antiprotons. Second, the case where the only allowed two-body final states are electrons. The latter case is typical of models aimed at fitting cosmic ray e(-) and e(+) data. We find that the multimessenger signatures of such models can be significantly modified with respect to results presented in the literature.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available