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Title: Indirect searches of dark matter via polynomial spectral features

Abstract

We derive the spectra arising from non-relativistic dark matter annihilations or decays into intermediary particles with arbitrary spin, which subsequently produce neutrinos or photons via two-body decays. Our approach is model independent and predicts spectral features restricted to a kinematic box. The overall shape within that box is a polynomial determined by the polarization of the decaying particle. We illustrate our findings with two examples. First, with the neutrino spectra arising from dark matter annihilations into the massive Standard Model gauge bosons. Second, with the gamma-ray and neutrino spectra generated by dark matter annihilations into hypothetical massive spin-2 particles. Our results are in particular applicable to the 750 GeV diphoton excess observed at the LHC if interpreted as a spin-0 or spin-2 particle coupled to dark matter. We also derive limits on the dark matter annihilation cross section into this resonance from the non-observation of the associated gamma-ray spectral features by the H.E.S.S. telescope.

Authors:
;  [1]
  1. Service de Physique Théorique, Université Libre de Bruxelles,Boulevard du Triomphe, CP225, Brussels, 1050 (Belgium)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572130
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 08; Other Information: PUBLISHER-ID: JCAP08(2016)023; OAI: oai:repo.scoap3.org:16772; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANNIHILATION; COSMIC GAMMA SOURCES; COSMIC PHOTONS; COSMIC RAY DETECTION; CROSS SECTIONS; ENERGY SPECTRA; GEV RANGE 100-1000; NONLUMINOUS MATTER; PARTICLE DECAY; POLYNOMIALS; STANDARD MODEL; TELESCOPE COUNTERS; TWO-BODY PROBLEM

Citation Formats

Garcia-Cely, Camilo, and Heeck, Julian. Indirect searches of dark matter via polynomial spectral features. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/08/023.
Garcia-Cely, Camilo, & Heeck, Julian. Indirect searches of dark matter via polynomial spectral features. United States. doi:10.1088/1475-7516/2016/08/023.
Garcia-Cely, Camilo, and Heeck, Julian. Thu . "Indirect searches of dark matter via polynomial spectral features". United States. doi:10.1088/1475-7516/2016/08/023.
@article{osti_22572130,
title = {Indirect searches of dark matter via polynomial spectral features},
author = {Garcia-Cely, Camilo and Heeck, Julian},
abstractNote = {We derive the spectra arising from non-relativistic dark matter annihilations or decays into intermediary particles with arbitrary spin, which subsequently produce neutrinos or photons via two-body decays. Our approach is model independent and predicts spectral features restricted to a kinematic box. The overall shape within that box is a polynomial determined by the polarization of the decaying particle. We illustrate our findings with two examples. First, with the neutrino spectra arising from dark matter annihilations into the massive Standard Model gauge bosons. Second, with the gamma-ray and neutrino spectra generated by dark matter annihilations into hypothetical massive spin-2 particles. Our results are in particular applicable to the 750 GeV diphoton excess observed at the LHC if interpreted as a spin-0 or spin-2 particle coupled to dark matter. We also derive limits on the dark matter annihilation cross section into this resonance from the non-observation of the associated gamma-ray spectral features by the H.E.S.S. telescope.},
doi = {10.1088/1475-7516/2016/08/023},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 08,
volume = 2016,
place = {United States},
year = {Thu Aug 11 00:00:00 EDT 2016},
month = {Thu Aug 11 00:00:00 EDT 2016}
}