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Title: Gamma-ray limits on neutrino lines

Abstract

Monochromatic neutrinos from dark matter annihilations (χχ→νν-bar) are always produced in association with a gamma-ray spectrum generated by electroweak bremsstrahlung. Consequently, these neutrino lines can be searched for not only with neutrino detectors but also indirectly with gamma-ray telescopes. Here, we derive limits on the dark matter annihilation cross section into neutrinos based on recent Fermi-LAT and HESS data. We find that, for dark matter masses above 200 GeV, gamma-ray data actually set the most stringent constraints on neutrino lines from dark matter annihilation and, therefore, an upper bound on the dark matter total annihilation cross section. In addition, we point out that gamma-ray telescopes, unlike neutrino detectors, have the potential to distinguish the flavor of the final state neutrino. Our results indicate that we have already entered into a new era where gamma-ray telescopes are more sensitive than neutrino detectors to neutrino lines from dark matter annihilation.

Authors:
; ;  [1];  [2]
  1. Max-Planck-Institut für Kernphysik,Saupfercheckweg 1, 69117 Heidelberg (Germany)
  2. (Netherlands)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572082
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 05; Other Information: PUBLISHER-ID: JCAP05(2016)050; OAI: oai:repo.scoap3.org:15720; 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:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; CHERENKOV COUNTERS; COSMIC GAMMA SOURCES; COSMIC NEUTRINOS; COSMIC RAY DETECTION; GAMMA SPECTRA; GEV RANGE 100-1000; MONOCHROMATIC RADIATION; NEUTRINO DETECTION; NONLUMINOUS MATTER; SI SEMICONDUCTOR DETECTORS; SPACE VEHICLES; STRING THEORY; TELESCOPE COUNTERS; TOTAL CROSS SECTIONS; NEUTRINO DETECTORS

Citation Formats

Queiroz, Farinaldo S., Yaguna, Carlos E., Weniger, Christoph, and GRAPPA Institute, University of Amsterdam,Science Park 904, 1090 GL Amsterdam, Netherland. Gamma-ray limits on neutrino lines. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/05/050.
Queiroz, Farinaldo S., Yaguna, Carlos E., Weniger, Christoph, & GRAPPA Institute, University of Amsterdam,Science Park 904, 1090 GL Amsterdam, Netherland. Gamma-ray limits on neutrino lines. United States. doi:10.1088/1475-7516/2016/05/050.
Queiroz, Farinaldo S., Yaguna, Carlos E., Weniger, Christoph, and GRAPPA Institute, University of Amsterdam,Science Park 904, 1090 GL Amsterdam, Netherland. Mon . "Gamma-ray limits on neutrino lines". United States. doi:10.1088/1475-7516/2016/05/050.
@article{osti_22572082,
title = {Gamma-ray limits on neutrino lines},
author = {Queiroz, Farinaldo S. and Yaguna, Carlos E. and Weniger, Christoph and GRAPPA Institute, University of Amsterdam,Science Park 904, 1090 GL Amsterdam, Netherland},
abstractNote = {Monochromatic neutrinos from dark matter annihilations (χχ→νν-bar) are always produced in association with a gamma-ray spectrum generated by electroweak bremsstrahlung. Consequently, these neutrino lines can be searched for not only with neutrino detectors but also indirectly with gamma-ray telescopes. Here, we derive limits on the dark matter annihilation cross section into neutrinos based on recent Fermi-LAT and HESS data. We find that, for dark matter masses above 200 GeV, gamma-ray data actually set the most stringent constraints on neutrino lines from dark matter annihilation and, therefore, an upper bound on the dark matter total annihilation cross section. In addition, we point out that gamma-ray telescopes, unlike neutrino detectors, have the potential to distinguish the flavor of the final state neutrino. Our results indicate that we have already entered into a new era where gamma-ray telescopes are more sensitive than neutrino detectors to neutrino lines from dark matter annihilation.},
doi = {10.1088/1475-7516/2016/05/050},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2016,
place = {United States},
year = {Mon May 23 00:00:00 EDT 2016},
month = {Mon May 23 00:00:00 EDT 2016}
}