WIMP dark matter through the dilaton portal

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We study a model in which dark matter couples to the Standard Model through a dilaton of a sector with spontaneously broken approximate scale invariance. Scale invariance fixes the dilaton couplings to the Standard Model and dark matter fields, leaving three main free parameters: the symmetry breaking scale f, the dilaton mass m(sigma), and the dark matter mass m(chi). We analyze the experimental constraints on the parameter space from collider, direct and indirect detection experiments including the effect of Sommerfeld enhancement, and show that dilaton exchange provides a consistent, calculable framework for cold dark matter with f, ma, mx of roughly similar magnitude and in the range 1-10 TeV. Direct and indirect detection experiments, notably future ground-based gamma ray and space-based cosmic ray measurements, can probe the model all the way to dark matter mass in the multi-TeV regime.
Publisher
SPRINGER
Issue Date
2015-03
Language
English
Article Type
Article
Citation

JOURNAL OF HIGH ENERGY PHYSICS, no.3

ISSN
1029-8479
DOI
10.1007/JHEP03(2015)099
URI
http://hdl.handle.net/10203/197729
Appears in Collection
PH-Journal Papers(저널논문)
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