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Title: Dark matter constraints from box-shaped gamma-ray features

Abstract

The observation of a sharp spectral feature in the gamma-ray sky would be one of the cleanest ways to identify dark matter and pinpoint its properties. Over the years a lot of attention has been paid to two specific features, namely gamma-ray lines and internal bremsstrahlung. Here, we explore a third class of spectral signatures, box-shaped gamma-ray spectra, that naturally arise in dark matter cascade annihilations or decays into intermediate particles that in turn decay into photons. Using Fermi-LAT data, we derive constraints on the dark matter parameter space for both annihilating and decaying dark matter, and show explicitly that our limits are competitive to strategies employing standard spectral features. More importantly, we find robust limits even in the case of non-degenerate dark matter and intermediate particle masses. This result is particularly relevant in constraining dark matter frameworks with gamma-ray data. We conclude by illustrating the power of box-shaped gamma-ray constraints on concrete particle physics scenarios.

Authors:
; ;  [1]
  1. Physik-Department T30d, Technische Universität München, James-Franck-Straße, 85748 Garching (Germany)
Publication Date:
OSTI Identifier:
22280051
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 07; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; ASTROPHYSICS; COSMOLOGY; GAMMA RADIATION; GAMMA SPECTRA; INTERNAL BREMSSTRAHLUNG; NONLUMINOUS MATTER; PHOTONS; SPACE

Citation Formats

Ibarra, Alejandro, Gehler, Sergio López, and Pato, Miguel, E-mail: ibarra@tum.de, E-mail: sergio.lopez@ph.tum.de, E-mail: miguel.pato@tum.de. Dark matter constraints from box-shaped gamma-ray features. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/07/043.
Ibarra, Alejandro, Gehler, Sergio López, & Pato, Miguel, E-mail: ibarra@tum.de, E-mail: sergio.lopez@ph.tum.de, E-mail: miguel.pato@tum.de. Dark matter constraints from box-shaped gamma-ray features. United States. doi:10.1088/1475-7516/2012/07/043.
Ibarra, Alejandro, Gehler, Sergio López, and Pato, Miguel, E-mail: ibarra@tum.de, E-mail: sergio.lopez@ph.tum.de, E-mail: miguel.pato@tum.de. Sun . "Dark matter constraints from box-shaped gamma-ray features". United States. doi:10.1088/1475-7516/2012/07/043.
@article{osti_22280051,
title = {Dark matter constraints from box-shaped gamma-ray features},
author = {Ibarra, Alejandro and Gehler, Sergio López and Pato, Miguel, E-mail: ibarra@tum.de, E-mail: sergio.lopez@ph.tum.de, E-mail: miguel.pato@tum.de},
abstractNote = {The observation of a sharp spectral feature in the gamma-ray sky would be one of the cleanest ways to identify dark matter and pinpoint its properties. Over the years a lot of attention has been paid to two specific features, namely gamma-ray lines and internal bremsstrahlung. Here, we explore a third class of spectral signatures, box-shaped gamma-ray spectra, that naturally arise in dark matter cascade annihilations or decays into intermediate particles that in turn decay into photons. Using Fermi-LAT data, we derive constraints on the dark matter parameter space for both annihilating and decaying dark matter, and show explicitly that our limits are competitive to strategies employing standard spectral features. More importantly, we find robust limits even in the case of non-degenerate dark matter and intermediate particle masses. This result is particularly relevant in constraining dark matter frameworks with gamma-ray data. We conclude by illustrating the power of box-shaped gamma-ray constraints on concrete particle physics scenarios.},
doi = {10.1088/1475-7516/2012/07/043},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 07,
volume = 2012,
place = {United States},
year = {2012},
month = {7}
}