Broken R-Parity in the Sky and at the LHC

Abstract

Supersymmetric extensions of the Standard Model with small R-parity and lepton number violating couplings are naturally consistent with primordial nucleosynthesis, thermal leptogenesis and gravitino dark matter. We consider supergravity models with universal boundary conditions at the grand unification scale, and scalar tau-lepton or bino-like neutralino as next-to-lightest superparticle (NLSP). Recent Fermi-LAT data on the isotropic diffuse gamma-ray flux yield a lower bound on the gravitino lifetime. Comparing two-body gravitino and neutralino decays we find a lower bound on a neutralino NLSP decay length, $c τ_{χ^0_1} \gsim 30 cm$. Together with gravitino and neutralino masses one obtains a microscopic determination of the Planck mass. For a stau-NLSP there exists no model-independent lower bound on the decay length. Here the strongest bound comes from the requirement that the cosmological baryon asymmetry is not washed out, which yields $c τ_{\tildeτ_1} \gsim 4 mm$. However, without fine-tuning of parameters, one finds much larger decay lengths. For typical masses, $m_{3/2}\sim 100GeV$ and $m_{NLSP}\sim 150GeV$, the discovery of a photon line with an intensity close to the Fermi-LAT limit would imply a decay length $c{\tau }_{NLSP}$ of several hundred meters, which can be measured at the LHC.

30 pages, 8 figures; v2: published version, reference added

References in corpus (30)

• R-parity violating supersymmetry
• Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• Hadronic Decay of Late-Decaying Particles and Big-Bang Nucleosynthesis
• Big Bang Nucleosynthesis Constraints on Hadronically and Electromagnetically Decaying Relic Neutral Particles
• Gravitino Dark Matter in R-Parity Breaking Vacua
• Gravitino Dark Matter without R-parity
• Sphaleron Erasure of Primordial Baryogenesis
• Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications
• The R-Parity Violating Minimal Supergravity Model
• Baryon Asymmetry and Dark Matter
• Correlation between neutrino oscillations and collider signals of supersymmetry in an R-parity violating model
• Quark Lepton Mass Hierarchies and the Baryon Asymmetry
• Supergravity at Colliders
• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Gamma-Rays from Decaying Dark Matter
• Neutrino Mixing and Flavour Changing Processes
• Probing bilinear R-parity violating supergravity at the LHC
• Implication of Super-Kamiokande Data on R-parity Violation
• Probing Gravitino Dark Matter with PAMELA and Fermi
• Radiative gravitino decays from R-parity violation
• Including R-parity violation in the numerical computation of the spectrum of the minimal supersymmetric standard model: SOFTSUSY
• Measuring lifetimes of long-lived charged massive particles stopped in LHC detectors
• Long-Lived Unstable Superparticles at the LHC
• Lepton Flavor Violation and Cosmological Constraints on R-parity Violation
• Photon, Neutrino and Charged Particle Spectra from R-violating Gravitino Decays
• Supersymmetry and Cosmology
• Superparticle Mass Window from Leptogenesis and Decaying Gravitino Dark Matter
• Neutrino Signals from Gravitino Dark Matter with Broken R-Parity

Cited by in corpus (25)

• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Physics at the e+ e- Linear Collider
• Probing Dark Matter Decay and Annihilation with Fermi LAT Observations of Nearby Galaxy Clusters
• Hunting Dark Matter Gamma-Ray Lines with the Fermi LAT
• X-ray line signal from decaying axino warm dark matter
• Decaying vs Annihilating Dark Matter in Light of a Tentative Gamma-Ray Line
• X-ray lines from R-parity violating decays of keV sparticles
• Gravitino dark matter and neutrino masses with bilinear R-parity violation
• Minimal Decaying Dark Matter and the LHC
• Long-lived higgsinos as probes of gravitino dark matter at the LHC
• Stau as the Lightest Supersymmetric Particle in R-Parity Violating SUSY Models: Discovery Potential with Early LHC Data
• Quasi-stable neutralinos at the LHC
• Axino dark matter with R-parity violation and 130 GeV gamma-ray line
• Antiproton Limits on Decaying Gravitino Dark Matter
• Stau Kinks at the LHC
• Unstable Gravitino Dark Matter - Prospects for Indirect and Direct Detection
• Long-Lived stop at the LHC with or without R-parity
• Light Higgsinos as Heralds of Higher-Dimensional Unification
• Portal Effective Theories: A framework for the model independent description of light hidden sector interactions
• The B-L Phase Transition: Implications for Cosmology and Neutrinos
• Gravitino Dark Matter in Tree Level Gauge Mediation with and without R-parity
• Indirect searches for gravitino dark matter
• Dynamical Matter-Parity Breaking and Gravitino Dark Matter
• Dynamical R-parity Breaking at the LHC
• Gravitino Dark Matter and Flavor Symmetries