Journal
PHYSICS LETTERS B
Volume 676, Issue 4-5, Pages 133-139Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2009.04.010
Keywords
Dark matter; Indirect detection; Bound-state
Ask authors/readers for more resources
We argue that WIMP dark matter can annihilate via long-lived WIMPonium bound states in reasonable particle physics models of dark matter (DM). WIMPonium bound states call occur at or near threshold leading to substantial enhancements in the DM annihilation rate, closely related to the Sommerfeld effect. Large boost factor amplifications in the annihilation rate call thus occur without large density enhancements. possibly preferring colder less dense objects such as dwarf galaxies as locations for indirect DM searches. The radiative capture to and transitions among the WIMPonium states generically lead to a rich energy spectrum of annihilation products, With many distinct lines possible in the case of 2-body decays to gamma gamma or gamma Z final states. The existence of multiple radiative capture modes further enhances the total annihilation rate, and the detection of the lines would give direct over-determined information on the nature and self-interactions of the DM particles. (C) 2009 Elsevier B.V. All rights reserved.
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