TY - JOUR
T1 - Gamma-rays from decaying dark matter
AU - Bertone, Gianfranco
AU - Buchmüller, Wilfried
AU - Covi, Laura
AU - Ibarra, Alejandro
PY - 2007/11/1
Y1 - 2007/11/1
N2 - We study the prospects for detecting gamma-rays from decaying dark matter (DM), focusing in particular on gravitino DM in R-parity breaking vacua. Given the substantially different angular distribution of the predicted gamma-ray signal with respect to the case of annihilating DM, and the relatively poor (of order 0.1°) angular resolution of gamma-ray detectors, the best strategy for detection is in this case to look for an exotic contribution to the gamma-ray flux at high galactic latitudes, where the decaying DM contribution would resemble an astrophysical extragalactic component, similar to the one inferred by EGRET observations. Upcoming experiments such as GLAST and AMS-02 may identify this exotic contribution and discriminate between it and astrophysical sources, or place significant constraints on the mass and lifetime of DM particles.
AB - We study the prospects for detecting gamma-rays from decaying dark matter (DM), focusing in particular on gravitino DM in R-parity breaking vacua. Given the substantially different angular distribution of the predicted gamma-ray signal with respect to the case of annihilating DM, and the relatively poor (of order 0.1°) angular resolution of gamma-ray detectors, the best strategy for detection is in this case to look for an exotic contribution to the gamma-ray flux at high galactic latitudes, where the decaying DM contribution would resemble an astrophysical extragalactic component, similar to the one inferred by EGRET observations. Upcoming experiments such as GLAST and AMS-02 may identify this exotic contribution and discriminate between it and astrophysical sources, or place significant constraints on the mass and lifetime of DM particles.
KW - Cosmology of theories beyond the SM
KW - Dark matter
KW - High energy photons
KW - Neutrino and gamma astronomy
UR - http://www.scopus.com/inward/record.url?scp=36749026733&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2007/11/003
DO - 10.1088/1475-7516/2007/11/003
M3 - Article
AN - SCOPUS:36749026733
SN - 1475-7516
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 11
M1 - 003
ER -