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Constraining light dark matter with diffuse X-ray and gamma-ray observations

Essig, Rouven and Kuflik, Eric and McDermott, Samuel D. and Volansky, Tomer and Zurek, Kathryn M. (2013) Constraining light dark matter with diffuse X-ray and gamma-ray observations. Journal of High Energy Physics, 2013 (11). Art. No. 193. ISSN 1029-8479. doi:10.1007/jhep11(2013)193.

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We present constraints on decaying and annihilating dark matter (DM) in the 4 keV to 10 GeV mass range, using published results from the satellites HEAO-1, INTEGRAL, COMPTEL, EGRET, and the Fermi Gamma-ray Space Telescope. We derive analytic expressions for the gamma-ray spectra from various DM decay modes, and find lifetime constraints in the range 10^(24) − 10^(28) sec, depending on the DM mass and decay mode. We map these constraints onto the parameter space for a variety of models, including a hidden photino that is part of a kinetically mixed hidden sector, a gravitino with R-parity violating decays, a sterile neutrino, DM with a dipole moment, and a dark pion. The indirect constraints on sterile-neutrino and hidden-photino DM are found to be more powerful than other experimental or astrophysical probes in some parts of parameter space. While our focus is on decaying DM, we also present constraints on DM annihilation to electron-positron pairs. We find that if the annihilation is p-wave suppressed, the galactic diffuse constraints are, depending on the DM mass and velocity at recombination, more powerful than the constraints from the Cosmic Microwave Background.

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Additional Information:This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received: September 26, 2013. Accepted: November 18, 2013. Published: November 26, 2013. We thank Kfir Blum, Germán Arturo Gomez-Vargas, Shmuel Nussinov, Javier Redondo, Robert Shrock, and Andrew Strong for helpful discussions. RE is supported in part by the DoE Early Career research program DESC0008061 and by a Sloan Foundation Research Fellowship. SDM and KZ are supported by the DoE under contract de-sc0007859, by NSF CAREER award PHY 1049896, and by NASA Astrophysics Theory grant NNX11AI17G. SDM is supported by the Fermilab Fellowship in Theoretical Physics. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. TV is supported in part by a grant from the Israel Science Foundation, the US-Israel Binational Science Foundation, the EU-FP7 Marie Curie, CIG fellowship and by the I-CORE Program of the Planning and Budgeting Committee and The Israel Science Foundation (grant NO 1937/12).
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0008061
Alfred P. Sloan FoundationUNSPECIFIED
Department of Energy (DOE)DE-SC0007859
Department of Energy (DOE)DE-AC02-07CH11359
Israel Science Foundation1937/12
Binational Science Foundation (USA-Israel)UNSPECIFIED
Marie Curie FellowshipUNSPECIFIED
I-CORE Program of the Planning and Budgeting CommitteeUNSPECIFIED
Subject Keywords:Cosmology of Theories beyond the SM, Supersymmetric Effective Theories, Supersymmetry Breaking
Issue or Number:11
Record Number:CaltechAUTHORS:20190613-164148523
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Official Citation:Essig, R., Kuflik, E., McDermott, S.D. et al. J. High Energ. Phys. (2013) 2013: 193.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96408
Deposited By: George Porter
Deposited On:17 Jun 2019 15:01
Last Modified:16 Nov 2021 17:20

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