Radiative gravitino decays from R-parity violation

Abstract

We study radiative gravitino decay within the framework of R-violating supersymmetry. For trilinear R-violating couplings that involve the third generation of fermions, or for light gravitinos, we find that the radiative loop-decay $\tilde{G}\to \gamma \nu$ dominates over the tree-level ones for a wide set of parameters. We calculate the gravitino decay width and study its implications for cosmology and collider physics. Slow-decaying gravitinos are good dark matter candidates, for a range of parameters that would also predict observable R-violating signatures in colliders. In general the branching ratios are very dependent on the relative hierarchies of R-violating operators, and may provide relevant information on the flavour structure of the underlying fundamental theory.

17 pages, 5 figures

References in corpus (43)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Automatized One-Loop Calculations in 4 and D dimensions
• Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
• EGRET Observations of the Extragalactic Gamma Ray Emission
• Diffuse Galactic continuum gamma rays. A model compatible with EGRET data and cosmic-ray measurements
• Big Bang Nucleosynthesis Constraints on Hadronically and Electromagnetically Decaying Relic Neutral Particles
• A new determination of the extragalactic diffuse gamma-ray background from EGRET data
• Gravitino Dark Matter in R-Parity Breaking Vacua
• Bounds on R-parity Violating Couplings at the Weak Scale and at the GUT Scale
• Supergravity with a Gravitino LSP
• Gravitino Dark Matter without R-parity
• Sphaleron Erasure of Primordial Baryogenesis
• Gravitino Dark Matter in the CMSSM
• Yukawa textures with an anomalous horizontal abelian symmetry
• Gravitino Dark Matter and Cosmological Constraints
• Correlation between neutrino oscillations and collider signals of supersymmetry in an R-parity violating model
• Upper bound on all products of R-parity violating couplings ${\lambda }^{\prime }$ and ${\lambda }^{\prime \prime }$ from proton decay
• Bound-State Effects on Light-Element Abundances in Gravitino Dark Matter Scenarios
• An Introduction to Explicit R-Parity Violation
• Gravitino Dark Matter in the CMSSM and Implications for Leptogenesis and the LHC
• $R$-parity-Violating Supersymmetric Yukawa Couplings: A Mini-review
• Gravitino Dark Matter in the CMSSM With Improved Constraints from BBN
• Stau-catalyzed ${}^6$Li Production in Big-Bang Nucleosynthesis
• Effects of the Gravitino on the Inflationary Universe
• Supersymmetric Neutrino Masses and Mixing with R-parity Violation
• Big Bang Nucleosynthesis with Bound States of Long-lived Charged Particles
• Signals of a superlight gravitino at hadron colliders when the other superparticles are heavy
• Anomaly-Free Gauged R-Symmetry in Local Supersymmetry
• R-parity-violating trilinear couplings and recent neutrino data
• Signals of a superlight gravitino at e^+ e^- colliders when the other superparticles are heavy
• Neutrino mass and magnetic moment in supersymmetry without R-parity in the light of recent data
• Neutrino Oscillations and Flavor Structure of Supersymmetry without R-Parity
• Pursuing interpretations of the HERA large-Q2 data
• Implications of Horizontal Symmetries on Baryon Number Violation in Supersymmetric Models
• Nucleosynthesis Bounds in Gauge-Mediated Supersymmetry Breaking Theories
• R-parity violation and the cosmological gravitino problem
• Hierarchies of R-violating interactions from Family Symmetries
• Quark flavour conserving violations of the lepton number
• Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
• Radiative decay of the lightest neutralino in an R-parity violating supersymmetric theory
• Non-abelian flavour symmetry and R-parity
• Photon Signatures for Low Energy Supersymmetry Breaking and Broken R-parity

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