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Gómez-Vargas, G.A.; López-Fogliani, D.E.; Muñoz, C.; Perez, A.D.; De Austri, R.R. "Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT" (2017) Journal of Cosmology and Astroparticle Physics. 2017(3)
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Abstract:

The μνSSM solves the μ problem of supersymmetric models and reproduces neutrino data, simply using couplings with right-handed neutrinos ν's. Given that these couplings break explicitly R parity, the gravitino is a natural candidate for decaying dark matter in the μνSSM. In this work we carry out a complete analysis of the detection of μνSSM gravitino dark matter through γ-ray observations. In addition to the two-body decay producing a sharp line, we include in the analysis the three-body decays producing a smooth spectral signature. We perform first a deep exploration of the low-energy parameter space of the μνSSM taking into account that neutrino data must be reproduced. Then, we compare the γ-ray fluxes predicted by the model with Fermi-LAT observations. In particular, with the 95% CL upper limits on the total diffuse extragalactic γ-ray background using 50 months of data, together with the upper limits on line emission from an updated analysis using 69.9 months of data. For standard values of bino and wino masses, gravitinos with masses larger than about 4 GeV, or lifetimes smaller than about 1028 s, produce too large fluxes and are excluded as dark matter candidates. However, when limiting scenarios with large and close values of the gaugino masses are considered, the constraints turn out to be less stringent, excluding masses larger than 17 GeV and lifetimes smaller than 4 × 1025 s. © 2017 IOP Publishing Ltd and Sissa Medialab srl .

Registro:

Documento: Artículo
Título:Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
Autor:Gómez-Vargas, G.A.; López-Fogliani, D.E.; Muñoz, C.; Perez, A.D.; De Austri, R.R.
Filiación:Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Santiago, Chile
Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, Rome, I-00133, Italy
Instituto de Física de Buenos Aires, UBA and CONICET, Departamento de Física, Facultad de Ciencia Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, 1428, Argentina
Departamento de Física Teórica, Universidad Autónoma de Madrid (UAM), Cantoblanco, Madrid, 28049, Spain
Instituto de Física Teórica UAM-CSIC, Campus de Cantoblanco UAM, Madrid, 28049, Spain
Instituto de Física Corpuscular CSIC-UV, c/Catedrático José Beltrán 2, Paterna, Valencia, 46980, Spain
Palabras clave:dark matter experiments; dark matter theory; gamma ray experiments
Año:2017
Volumen:2017
Número:3
DOI: http://dx.doi.org/10.1088/1475-7516/2017/03/047
Título revista:Journal of Cosmology and Astroparticle Physics
Título revista abreviado:J. Cosmol. Astroparticle Phys.
ISSN:14757516
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2017_n3_p_GomezVargas

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Citas:

---------- APA ----------
Gómez-Vargas, G.A., López-Fogliani, D.E., Muñoz, C., Perez, A.D. & De Austri, R.R. (2017) . Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT. Journal of Cosmology and Astroparticle Physics, 2017(3).
http://dx.doi.org/10.1088/1475-7516/2017/03/047
---------- CHICAGO ----------
Gómez-Vargas, G.A., López-Fogliani, D.E., Muñoz, C., Perez, A.D., De Austri, R.R. "Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT" . Journal of Cosmology and Astroparticle Physics 2017, no. 3 (2017).
http://dx.doi.org/10.1088/1475-7516/2017/03/047
---------- MLA ----------
Gómez-Vargas, G.A., López-Fogliani, D.E., Muñoz, C., Perez, A.D., De Austri, R.R. "Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT" . Journal of Cosmology and Astroparticle Physics, vol. 2017, no. 3, 2017.
http://dx.doi.org/10.1088/1475-7516/2017/03/047
---------- VANCOUVER ----------
Gómez-Vargas, G.A., López-Fogliani, D.E., Muñoz, C., Perez, A.D., De Austri, R.R. Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT. J. Cosmol. Astroparticle Phys. 2017;2017(3).
http://dx.doi.org/10.1088/1475-7516/2017/03/047