Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
arXiv:hep-ph/0504102
Abstract
In general the gravitino mass and/or the soft supersymmetry breaking masses in the observable sector can be much larger than the TeV scale. Depending on the relation between the masses, new important channels for gravitino production in the early Universe can arise. Gravitinos with a mass above 50 TeV decay before big bang nucleosynthesis, which leads to relaxation of the well known bound on the reheating temperature GeV. However, if the heavy gravitinos are produced abundantly in the early Universe, their decay can alter the abundance of the lightest supersymmetric particle. Moreover, they may dominate the energy density of the Universe. Their decay will in this case increase entropy and dilute already created baryon asymmetry and dark matter. Such considerations put new constraints on gravitino and sfermion masses, and the reheating temperature. In this paper we examine various cosmological consequences of supermassive gravitinos. We discuss advnatges and disadvantages of a large reheating temperature in connection with thermal leptogenesis, and find that large parts of the parameter space are opened up for the lightest right-handed (s)neutrino mass. We also discuss the viability of Affleck-Dine baryogenesis under the constraints from gravitino decay, and gravitino production from the decay of Q-balls.
arXiv comment47 pages, 6 figures, JHEP style
References in corpus (71)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Supersymmetric Dark Matter
- de Sitter Vacua in String Theory
- Hierarchies from Fluxes in String Compactifications
- Towards the Theory of Reheating After Inflation
- Reheating after Inflation
- Theories with Gauge-Mediated Supersymmetry Breaking
- Quantization of Four-form Fluxes and Dynamical Neutralization of the Cosmological Constant
- Towards Inflation in String Theory
- A lower bound on the right-handed neutrino mass from leptogenesis
- Universe Reheating after Inflation
- Resonant Leptogenesis
- Towards a complete theory of thermal leptogenesis in the SM and MSSM
- Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
- CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
- Supersymmetric Q-balls as dark matter
- Aspects of Split Supersymmetry
- The Anthropic Landscape of String Theory
- MeV-scale Reheating Temperature and Thermalization of Neutrino Background
- A new mechanism for generating density perturbations from inflation
- What is the lowest possible reheating temperature?
- Q-Balls and Baryogenesis in the MSSM
- Primordial Nucleosynthesis: Theory and Observations
- Hadronic Decay of Late-Decaying Particles and Big-Bang Nucleosynthesis
- Updated Nucleosynthesis Constraints on Unstable Relic Particles
- The Neutrino Mass Window for Baryogenesis
- Neutrino Phenomenology -- the case of two right handed neutrinos
- Preheating of Fermions
- Constraints on neutrino masses from leptogenesis models
- Gravitino Production After Inflation
- Leptogenesis in Inflationary Universe
- Baryon Asymmetry, Neutrino Mixing and Supersymmetric SO(10) Unification
- Leptogenesis, CP violation and neutrino data: What can we learn?
- Thermal and Non-Thermal Production of Gravitinos in the Early Universe
- On the Connection of Leptogenesis with Low Energy CP Violation and LFV Charged Lepton Decays
- Resonant τ-Leptogenesis with Observable Lepton Number Violation
- Soft Leptogenesis
- Some Issues in Flat Direction Baryogenesis
- Basic results in Vacuum Statistics
- Flat Potential for Inflaton with a Discrete -invariance in Supergravity
- Some Aspects of Thermal Leptogenesis
- On the Explicit Construction and Statistics of Calabi-Yau Flux Vacua
- Low Energy Supersymmetry From the Landscape
- Effects of the Gravitino on the Inflationary Universe
- Supersymmetry Breaking in the Anthropic Landscape
- Nonequilibrium dynamics of fermions in a spatially homogeneous scalar background field
- Thermalization after inflation and production of massive stable particles
- MSSM flat direction as a curvaton
- Multiple Inflation, Cosmic String Networks and the String Landscape
- Superheavy Supersymmetry from Scalar Mass--A Parameter Fixed Points
- Low-scale leptogenesis and soft supersymmetry breaking
- Low-scale standard supersymmetric leptogenesis
- Inflatonic Solitons In Running Mass Inflation
- From weak-scale observables to leptogenesis
- Neutralino Dark Matter from Heavy Gravitino Decay
- Neutrino masses and the baryon asymmetry
- Evolution of primordial perturbations and a fluctuating decay rate
- MSSM Higgses as the source of reheating and all matter
- Split Supersymmetry from Anomalous U(1)
- Statistics of String vacua
- Dumping inflaton energy density out of this world
- Scenarios of modulated perturbations
- Non-thermal leptogenesis with almost degenerate superheavy neutrinos
- Post-inflationary thermalization with hadronization scenario
- Baryogenesis and lepton number violation
- Leptogenesis through direct inflaton decay to light particles
- Enhanced reheating via Bose condensates
- Non-thermal leptogenesis via direct inflaton decay without SU(2)(L) triplets
- Structure of split supersymmetry and simple models
- Some Comments on "Split" Supersymmetry
- Cosmological bounds on large extra dimensions from non-thermal production of Kaluza-Klein modes