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Title: Multi-Component Dark Matter

We explore multi-component dark matter models where the dark sector consists of multiple stable states with different mass scales, and dark forces coupling these states further enrich the dynamics. The multi-component nature of the dark matter naturally arises in supersymmetric models, where both R parity and an additional symmetry, such as a Z{sub 2}, is preserved. We focus on a particular model where the heavier component of dark matter carries lepton number and annihilates mostly to leptons. The heavier component, which is essentially a sterile neutrino, naturally explains the PAMELA, ATIC and synchrotron signals, without an excess in antiprotons which typically mars other models of weak scale dark matter. The lighter component, which may have a mass from a GeV to a TeV, may explain the DAMA signal, and may be visible in low threshold runs of CDMS and XENON, which search for light dark matter.
Authors:
Publication Date:
OSTI Identifier:
944760
Report Number(s):
FERMILAB-PUB-08-542-A
arXiv eprint number arXiv:0811.4429; TRN: US0900615
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTIPROTONS; LEPTON NUMBER; LEPTONS; NONLUMINOUS MATTER; PARITY; SYMMETRY; SYNCHROTRONS; XENON Phenomenology-HEP