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Updated: Apr 10, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Heavy dark matter annihilation from effective field theory
Grigory Ovanesyan1, Tracy R Slatyer2, Iain W Stewart2
1Physics Department, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA.
Abstract:
We formulate an effective field theory description for SU(2)_{L} triplet fermionic dark matter by combining nonrelativistic dark matter with gauge bosons in the soft-collinear effective theory. For a given dark matter mass, the annihilation cross section to line photons is obtained with 5% precision by simultaneously including Sommerfeld enhancement and the resummation of electroweak Sudakov logarithms at next-to-leading logarithmic order. Using these results, we present more accurate and precise predictions for the gamma-ray line signal from annihilation, updating both existing constraints and the reach of future experiments.
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