Neutrino Signals from Gravitino Dark Matter with Broken R-Parity

Abstract

The gravitino is a promising supersymmetric dark matter candidate, even without strict R-parity conservation. In fact, with some small R-parity violation, gravitinos are sufficiently long-lived to constitute the dark matter of the universe, while the resulting cosmological scenario is consistent with primordial nucleosynthesis and the high reheating temperature needed for thermal leptogenesis. Furthermore, in this scenario the gravitino is unstable and might thus be accessible by indirect detection via its decay products. We compute in this thesis the partial decay widths for the gravitino in models with bilinear R-parity breaking. In addition, we determine the neutrino signal from astrophysical gravitino dark matter decays. Finally, we discuss the feasibility of detecting these neutrino signals in present and future neutrino experiments, and conclude that it will be a challenging task. Albeit, if detected, this distinctive signal might bring considerable support to the scenario of decaying gravitino dark matter.

Diploma thesis, Universität Hamburg, September 2008; 116 pages, 17 figures

References in corpus (10)

• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• Stau-catalyzed ${}^6$Li Production in Big-Bang Nucleosynthesis
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• A Measurement of Atmospheric Neutrino Flux Consistent with Tau Neutrino Appearance
• Model-Independent Bound on the Dark Matter Lifetime
• On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios
• Cosmological Constraints on Gravitino LSP Scenario with Sneutrino NLSP
• Radiative gravitino decays from R-parity violation
• Electroweak Contributions to Thermal Gravitino Production
• Supersymmetric Dark Matter Candidates - The Lightest Neutralino, the Gravitino, and the Axino

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• Decaying vs Annihilating Dark Matter in Light of a Tentative Gamma-Ray Line
• Broken R-Parity in the Sky and at the LHC
• Gravitino Dark Matter and Neutrino Masses in Partial Split Supersymmetry
• Antiproton Limits on Decaying Gravitino Dark Matter
• PeV scale Supersymmetry breaking and the IceCube neutrino flux
• Unstable Gravitino Dark Matter - Prospects for Indirect and Direct Detection
• (N)LSP Decays and Gravitino Dark Matter Relic Abundance in Big Divisor (nearly) SLagy D3/D7 mu-Split SUSY
• Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors
• Electroweak Dark Matter
• Probing the anomalous positron fraction origin with fully leptonic decaying gravitino dark matter candidates
• Topics in Supergravity Phenomenology