Resummed photon spectra for WIMP annihilation

Matthew Baumgart, Timothy Cohen, Ian Moult, Nicholas L. Rodd, Tracy R. Slatyer, Mikhail P. Solon, Iain W. Stewart, Varun Vaidya

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We construct an effective field theory (EFT) description of the hard photon spectrum for heavy WIMP annihilation. This facilitates precision predictions relevant for line searches, and allows the incorporation of non-trivial energy resolution effects. Our framework combines techniques from non-relativistic EFTs and soft-collinear effective theory (SCET), as well as its multi-scale extensions that have been recently introduced for studying jet substructure. We find a number of interesting features, including the simultaneous presence of SCETI and SCETII modes, as well as collinear-soft modes at the electroweak scale. We derive a factorization formula that enables both the resummation of the leading large Sudakov double logarithms that appear in the perturbative spectrum, and the inclusion of Sommerfeld enhancement effects. Consistency of this factorization is demonstrated to leading logarithmic order through explicit calculation. Our final result contains both the exclusive and the inclusive limits, thereby providing a unifying description of these two previously-considered approximations. We estimate the impact on experimental sensitivity, focusing for concreteness on an SU(2)W triplet fermion dark matter — the pure wino — where the strongest constraints are due to a search for gamma-ray lines from the Galactic Center. We find numerically significant corrections compared to previous results, thereby highlighting the importance of accounting for the photon spectrum when interpreting data from current and future indirect detection experiments.

Original languageEnglish (US)
Article number117
JournalJournal of High Energy Physics
Volume2018
Issue number3
DOIs
StatePublished - Mar 1 2018

Fingerprint

weakly interacting massive particles
factorization
photons
substructures
logarithms
dark matter
fermions
gamma rays
inclusions
augmentation
estimates
predictions
approximation
energy

Keywords

  • Jets
  • Phenomenological Models

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Baumgart, M., Cohen, T., Moult, I., Rodd, N. L., Slatyer, T. R., Solon, M. P., ... Vaidya, V. (2018). Resummed photon spectra for WIMP annihilation. Journal of High Energy Physics, 2018(3), [117]. https://doi.org/10.1007/JHEP03(2018)117

Resummed photon spectra for WIMP annihilation. / Baumgart, Matthew; Cohen, Timothy; Moult, Ian; Rodd, Nicholas L.; Slatyer, Tracy R.; Solon, Mikhail P.; Stewart, Iain W.; Vaidya, Varun.

In: Journal of High Energy Physics, Vol. 2018, No. 3, 117, 01.03.2018.

Research output: Contribution to journalArticle

Baumgart, M, Cohen, T, Moult, I, Rodd, NL, Slatyer, TR, Solon, MP, Stewart, IW & Vaidya, V 2018, 'Resummed photon spectra for WIMP annihilation', Journal of High Energy Physics, vol. 2018, no. 3, 117. https://doi.org/10.1007/JHEP03(2018)117
Baumgart M, Cohen T, Moult I, Rodd NL, Slatyer TR, Solon MP et al. Resummed photon spectra for WIMP annihilation. Journal of High Energy Physics. 2018 Mar 1;2018(3). 117. https://doi.org/10.1007/JHEP03(2018)117
Baumgart, Matthew ; Cohen, Timothy ; Moult, Ian ; Rodd, Nicholas L. ; Slatyer, Tracy R. ; Solon, Mikhail P. ; Stewart, Iain W. ; Vaidya, Varun. / Resummed photon spectra for WIMP annihilation. In: Journal of High Energy Physics. 2018 ; Vol. 2018, No. 3.
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