Search for 100 MeV to 10 GeV γ-ray lines in the Fermi-LAT data and implications for gravitino dark matter in the μνSSM

Albert, Andrea; Bloom, Elliott D.; Charles, Eric; Gómez-Vargas, Germán A.; Grefe, Michael; Muñoz, Carlos; Weniger, Christoph; Mazziotta, Mario N.; Morselli, Aldo

doi:10.1088/1475-7516/2014/10/023

Search for 100 MeV to 10 GeV γ-ray lines in the Fermi-LAT data and implications for gravitino dark matter in the μνSSM

Journal Article · Wed Oct 01 04:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/10/023· OSTI ID:22375800

Albert, Andrea; Bloom, Elliott D.; Charles, Eric ^[1]; Gómez-Vargas, Germán A.; Grefe, Michael; Muñoz, Carlos ^[2]; Weniger, Christoph ^[3]; Mazziotta, Mario N. ^[4]; Morselli, Aldo ^[5]

W.W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
Instituto de Física Teórica UAM/CSIC and Departamento de Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid (Spain)
GRAPPA, University of Amsterdam, Science Park 904, 1098XH Amsterdam (Netherlands)
Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70126 Bari (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Roma ''Tor Vergata'', Via della Ricerca Scientica, 00133 Roma (Italy)

Dark matter decay or annihilation may produce monochromatic signals in the γ-ray energy range. In this work we argue that there are strong theoretical motivations for studying these signals in the framework of gravitino dark matter decay and we perform a search for γ-ray spectral lines from 100 MeV to 10 GeV with Fermi-LAT data. In contrast to previous line searches at higher energies, the sensitivity of the present search is dominated by systematic uncertainties across most of the energy range considered. We estimate the size of systematic effects by analysing the flux from a number of control regions, and include the systematic uncertainties consistently in our fitting procedure. We have not observed any significant signals and present model-independent limits on γ-ray line emission from decaying and annihilating dark matter. We apply the former limits to the case of the gravitino, a well-known dark matter candidate in supersymmetric scenarios. In particular, the R-parity violating ''μ from ν'' Supersymmetric Standard Model μνSSM) is an attractive scenario in which including right-handed neutrinos solves the μ problem of the Minimal Supersymmetric Standard Model while simultaneously explaining the origin of neutrino masses. At the same time, the violation of R-parity renders the gravitino unstable and subject to decay into a photon and a neutrino. As a consequence of the limits on line emission, μνSSM gravitinos with masses larger than about 5 GeV, or lifetimes smaller than about 10{sup 28} s, are excluded at 95% confidence level as dark matter candidates.

OSTI ID:: 22375800

Journal Information:: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 10 Vol. 2014; ISSN 1475-7516

Country of Publication:: United States

Language:: English

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The Darkest Hour Before Dawn: Contributions to Cosmic Reionization from Dark Matter Annihilation and Decay Liu, Hongwan; Slatyer, Tracy R.; Zavala, Jesús arXiv https://doi.org/10.48550/arxiv.1604.02457	text	January 2016
The e-ASTROGAM mission (exploring the extreme Universe with gamma rays in the MeV-GeV range) De Angelis, Alessandro; Tatischeff, Vincent; Tavani, Marco arXiv https://doi.org/10.48550/arxiv.1611.02232	text	January 2016
Almost closing the ν MSM sterile neutrino dark matter window with NuSTAR Perez, Kerstin; Ng, Kenny C. Y.; Beacom, John F. Physical Review D, Vol. 95, Issue 12 https://doi.org/10.1103/physrevd.95.123002	journal	June 2017
Search for Gamma-ray Emission from Dark Matter Annihilation in the Large Magellanic Cloud with the Fermi Large Area Telescope Buckley, Matthew R.; Charles, Eric; Gaskins, Jennifer M. arXiv https://doi.org/10.48550/arxiv.1502.01020	text	January 2015
Prospects for indirect dark matter searches with MeV photons Bartels, Richard; Gaggero, Daniele; Weniger, Christoph arXiv https://doi.org/10.48550/arxiv.1703.02546	text	January 2017
Search for Spectral Irregularities due to Photon–Axionlike-Particle Oscillations with the Fermi Large Area Telescope Ajello, M.; Al., Et American Physical Society (APS) https://doi.org/10.13016/m2pvf1-yzz6	collection	January 2016
Wimp searches with gamma rays in the Fermi era: Challenges, methods and results Conrad, J.; Cohen-Tanugi, J.; Strigari, L. E. Journal of Experimental and Theoretical Physics, Vol. 121, Issue 6 https://doi.org/10.1134/s1063776115130099	journal	December 2015
Gamma Ray polarimetry; a new window for the non-thermal Universe Ilie, Cosmin arXiv https://doi.org/10.48550/arxiv.1906.02824	text	January 2019
Contributions to cosmic reionization from dark matter annihilation and decay Liu, Hongwan; Slatyer, Tracy R.; Zavala, Jesús Physical Review D, Vol. 94, Issue 6 https://doi.org/10.1103/physrevd.94.063507	journal	September 2016
The e-ASTROGAM mission De Angelis, A.; Tatischeff, V.; Tavani, M. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2017-11455	text	January 2017
Searching for left sneutrino LSP at the LHC Ghosh, Pradipta; Lara, Inaki; Lopez-Fogliani, Daniel E. arXiv https://doi.org/10.48550/arxiv.1707.02471	text	January 2017
WIMP searches with gamma rays in the Fermi era: challenges, methods and results Conrad, Jan; Cohen-Tanugi, Johann; Strigari, Louis E. arXiv https://doi.org/10.48550/arxiv.1503.06348	text	January 2015
Search for line-like signals in the all-sky Fermi-LAT data Li, Shang; Xia, Zi-Qing; Liang, Yun-Feng Physical Review D, Vol. 99, Issue 12 https://doi.org/10.1103/physrevd.99.123519	journal	June 2019
Strong optimized conservative Fermi-LAT constraints on dark matter models from the inclusive photon spectrum Massari, Andrea; Izaguirre, Eder; Essig, Rouven Physical Review D, Vol. 91, Issue 8 https://doi.org/10.1103/physrevd.91.083539	journal	April 2015
Gamma-Ray Polarimetry: A New Window for the Nonthermal Universe Ilie, Cosmin Publications of the Astronomical Society of the Pacific, Vol. 131, Issue 1005 https://doi.org/10.1088/1538-3873/ab2a3a	journal	September 2019
Quantum field theory of relic nonequilibrium systems Underwood, Nicolas G.; Valentini, Antony Physical Review D, Vol. 92, Issue 6 https://doi.org/10.1103/physrevd.92.063531	journal	September 2015
Search for Spectral Irregularities due to Photon–Axionlike-Particle Oscillations with the Fermi Large Area Telescope Ajello, M.; Albert, A.; Anderson, B. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2016-06170	text	January 2016
Searching for left sneutrino LSP at the LHC Ghosh, Pradipta; Lara, Iñaki; López-Fogliani, Daniel E. International Journal of Modern Physics A, Vol. 33, Issue 18n19 https://doi.org/10.1142/s0217751x18501105	journal	July 2018
Search for Spectral Irregularities due to Photon–Axionlike-Particle Oscillations with the Fermi Large Area Telescope Ajello, M.; Albert, A.; Anderson, B. Physical Review Letters, Vol. 116, Issue 16 https://doi.org/10.1103/physrevlett.116.161101	journal	April 2016
The e-ASTROGAM mission: Exploring the extreme Universe with gamma rays in the MeV – GeV range De Angelis, A.; Tatischeff, V.; Tavani, M. Experimental Astronomy, Vol. 44, Issue 1 https://doi.org/10.1007/s10686-017-9533-6	journal	June 2017

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