Big-Bang Nucleosynthesis and Gravitino

Abstract

We derive big-bang nucleosynthesis (BBN) constraints on both unstable and stable gravitino taking account of recent progresses in theoretical study of the BBN processes as well as observations of primordial light-element abundances. In the case of unstable gravitino, we set the upper limit on the reheating temperature assuming that the primordial gravitinos are mainly produced by the scattering processes of thermal particles. For stable gravitino, we consider Bino, stau and sneutrino as the next-to-the-lightest supersymmetric particle and obtain constraints on their properties. Compared with the previous works, we improved the following points: (i) we use the most recent observational data, (ii) for gravitino production, we include contribution of the longitudinal component, and (iii) for the case with unstable long-lived stau, we estimate the bound-state effect of stau accurately by solving the Boltzmann equation.

27 pages, 16 figures

References in corpus (13)

• The primordial abundance of 4He: a self-consistent empirical analysis of systematic effects in a large sample of low-metallicity HII regions
• Inflaton Decay in Supergravity
• Stau-catalyzed ${}^6$Li Production in Big-Bang Nucleosynthesis
• Anomaly-Induced Inflaton Decay and Gravitino-Overproduction Problem
• Big-Bang Nucleosynthesis with Long-Lived Charged Slepton
• Primordial Lithium Abundance in Catalyzed Big Bang Nucleosynthesis
• Possible solution to the ${}^7$Li problem by the long lived stau
• Solving the cosmic lithium problems with primordial late-decaying particles
• Entropy production by Q-ball decay for diluting long-lived charged particles
• Bridging the primordial A=8 divide with Catalyzed Big Bang Nucleosynthesis
• Extremely Long-Lived Charged Massive Particles as A Probe for Reheating of the Universe
• Gravitino dark matter from increased thermal relic particles
• Flaxino dark matter and stau decay

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• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Axinos as Dark Matter Particles
• The number density of a charged relic
• Gravitino Dark Matter and the Cosmic Lithium Abundances
• Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario
• Long-Lived Unstable Superparticles at the LHC
• Mainly axion cold dark matter in the minimal supergravity model
• Non-Gaussianity from Baryon Asymmetry
• Modified Higgs Boson Phenomenology from Gauge or Gaugino Mediation in the NMSSM
• New Constraints on Radiative Decay of Long-Lived Particles in Big Bang Nucleosynthesis with New ${}^4$He Photodisintegration Data
• Successful Leptogenesis in SO(10) Unification with a Left-Right Symmetric Seesaw Mechanism
• A new, direct link between the baryon asymmetry and neutrino masses
• Quintessential Kination and Thermal Production of Gravitinos and Axinos
• A light neutralino in hybrid models of supersymmetry breaking
• CP Violation in the SUSY Seesaw: Leptogenesis and Low Energy
• Non-thermal Gravitino Dark Matter in Gauge Mediation
• Upper Limits on the Peccei-Quinn Scale and on the Reheating Temperature in Axino Dark Matter Scenarios
• Gauge Mediation with Sequestered Supersymmetry Breaking
• The long-lived stau as a thermal relic
• Reheating in Chaotic D-Term Inflation
• TASI 2008 lectures on Collider Signals II: E_T^missing signatures and the dark matter connection