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Title: Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT

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 10{sup 28} s, produce too large fluxes and are excluded as dark matter candidates. However, when limiting scenarios with large andmore » 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 × 10{sup 25} s.« less

Authors:
 [1]; ;  [2];  [3];  [4]
  1. Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Santiago (Chile)
  2. Instituto de Física de Buenos Aires, UBA and CONICET, Departamento de Física, Facultad de Ciencia Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires (Argentina)
  3. Departamento de Física Teórica, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid (Spain)
  4. Instituto de Física Corpuscular CSIC-UV, c/Catedrático José Beltrán 2, 46980 Paterna (Valencia) (Spain)
Publication Date:
OSTI Identifier:
22679957
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPARATIVE EVALUATIONS; COUPLING; DETECTION; EMISSION; EXPLORATION; GAMMA RADIATION; GEV RANGE; GRAVITINOS; LIFETIME; MANY-BODY PROBLEM; MASS; NEUTRINOS; NONLUMINOUS MATTER; PARITY; PARTICLE DECAY; SPACE; SUPERSYMMETRY

Citation Formats

Gómez-Vargas, Germán A., López-Fogliani, Daniel E., Perez, Andres D., Muñoz, Carlos, and De Austri, Roberto Ruiz, E-mail: ggomezv@uc.cl, E-mail: daniel.lopez@df.uba.ar, E-mail: c.munoz@uam.es, E-mail: andres.perez@df.uba.ar, E-mail: rruiz@ific.uv.es. Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/03/047.
Gómez-Vargas, Germán A., López-Fogliani, Daniel E., Perez, Andres D., Muñoz, Carlos, & De Austri, Roberto Ruiz, E-mail: ggomezv@uc.cl, E-mail: daniel.lopez@df.uba.ar, E-mail: c.munoz@uam.es, E-mail: andres.perez@df.uba.ar, E-mail: rruiz@ific.uv.es. Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT. United States. doi:10.1088/1475-7516/2017/03/047.
Gómez-Vargas, Germán A., López-Fogliani, Daniel E., Perez, Andres D., Muñoz, Carlos, and De Austri, Roberto Ruiz, E-mail: ggomezv@uc.cl, E-mail: daniel.lopez@df.uba.ar, E-mail: c.munoz@uam.es, E-mail: andres.perez@df.uba.ar, E-mail: rruiz@ific.uv.es. Wed . "Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT". United States. doi:10.1088/1475-7516/2017/03/047.
@article{osti_22679957,
title = {Search for sharp and smooth spectral signatures of μνSSM gravitino dark matter with Fermi-LAT},
author = {Gómez-Vargas, Germán A. and López-Fogliani, Daniel E. and Perez, Andres D. and Muñoz, Carlos and De Austri, Roberto Ruiz, E-mail: ggomezv@uc.cl, E-mail: daniel.lopez@df.uba.ar, E-mail: c.munoz@uam.es, E-mail: andres.perez@df.uba.ar, E-mail: rruiz@ific.uv.es},
abstractNote = {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 10{sup 28} 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 × 10{sup 25} s.},
doi = {10.1088/1475-7516/2017/03/047},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 03,
volume = 2017,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}