Matching resummed endpoint and continuum γ-ray spectra from dark-matter annihilation
Abstract
For the minimal wino and Higgsino benchmark models we provide accurate energy spectra of high-energy photons from TeV scale dark-matter annihilation χχ → γ + X by merging electroweak Sudakov resummation near maximal energy with the electroweak parton-shower PPPC4DM, and accounting for the Sommerfeld effect. Electroweak resummation significantly changes the shape of the photon-energy spectrum in the wide range Eγ ∼ (0.6 … 1)mχ and hence the form of the so-called "line-signal".
- Publication:
-
Physics Letters B
- Pub Date:
- November 2022
- DOI:
- 10.1016/j.physletb.2022.137248
- arXiv:
- arXiv:2203.01692
- Bibcode:
- 2022PhLB..83437248B
- Keywords:
-
- High Energy Physics - Phenomenology;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 18 pages, 5 figures, ancillary code DM$\gamma$Spec available at https://dmyspec.hepforge.org/