Gravitino Dark Matter

Journal Article · Tue Feb 09 23:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3327554· OSTI ID:21349520

Buchmueller, Wilfried ^[1]

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1. Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg (Germany)

Gravitino dark matter, together with thermal leptogenesis, implies an upper bound on the masses of superparticles. In the case of broken R-parity the constraints from primordial nucleosynthesis are naturally satisfied and decaying gravitinos lead to characteristic signatures in high energy cosmic rays. Electron and positron fluxes from gravitino decays cannot explain both, the PAMELA positron fraction and the electron+positron flux recently measured by Fermi LAT. The observed fluxes require astrophysical sources. The measured antiproton flux allows for a sizable contribution of decaying gravitinos to the gamma-ray spectrum, in particular a line at an energy below 300 GeV.

• OSTI ID: 21349520
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1200; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIBARYONS
ANTILEPTONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
COSMIC RAY FLUX
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GAMMA SPECTRA
GEV RANGE
GRAVITATIONAL RADIATION
GRAVITONS
HADRONS
LEPTONS
MASS
MASSLESS PARTICLES
MATTER
NONLUMINOUS MATTER
NUCLEI
NUCLEONS
NUCLEOSYNTHESIS
PARITY
PARTICLE PRODUCTION
PARTICLE PROPERTIES
POSITRONS
POSTULATED PARTICLES
PROTONS
QUARKS
RADIATION FLUX
RADIATIONS
REST MASS
SPECTRA
SUPERSYMMETRY
SYMMETRY
SYNTHESIS