Heavy Dark Matter Annihilation from Effective Field Theory
High Energy Physics - Phenomenology
2015-06-03 v1 Cosmology and Nongalactic Astrophysics
High Energy Astrophysical Phenomena
Nuclear Theory
Abstract
We formulate an effective field theory description for SU(2) 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.
Cite
@article{arxiv.1409.8294,
title = {Heavy Dark Matter Annihilation from Effective Field Theory},
author = {Grigory Ovanesyan and Tracy R. Slatyer and Iain W. Stewart},
journal= {arXiv preprint arXiv:1409.8294},
year = {2015}
}
Comments
5 pages, 2 figures