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arXiv · 1409.8294

Heavy Dark Matter Annihilation from Effective Field Theory

Grigory Ovanesyan·Tracy R. Slatyer·Iain W. Stewart
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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-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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Grigory Ovanesyan, Tracy R. Slatyer, Iain W. Stewart. 2014-09-29. Heavy Dark Matter Annihilation from Effective Field Theory. https://doi.org/10.1103/physrevlett.114.211302

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