Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT

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 o...

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Detalles Bibliográficos
Publicado: 2017
Materias:
dark matter experiments
dark matter theory
gamma ray experiments
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2017_n3_p_GomezVargas
http://hdl.handle.net/20.500.12110/paper_14757516_v2017_n3_p_GomezVargas
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14757516_v2017_n3_p_GomezVargas
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spelling paper:paper_14757516_v2017_n3_p_GomezVargas2023-06-08T16:17:58Z Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT dark matter experiments dark matter theory gamma ray experiments 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 . 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2017_n3_p_GomezVargas http://hdl.handle.net/20.500.12110/paper_14757516_v2017_n3_p_GomezVargas
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic dark matter experiments
dark matter theory
gamma ray experiments
spellingShingle dark matter experiments
dark matter theory
gamma ray experiments
Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
topic_facet dark matter experiments
dark matter theory
gamma ray experiments
description 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 .
title Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
title_short Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
title_full Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
title_fullStr Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
title_full_unstemmed Search for sharp and smooth spectral signatures of μν SSM gravitino dark matter with Fermi-LAT
title_sort search for sharp and smooth spectral signatures of μν ssm gravitino dark matter with fermi-lat
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2017_n3_p_GomezVargas
http://hdl.handle.net/20.500.12110/paper_14757516_v2017_n3_p_GomezVargas
_version_ 1768546690333147136

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