Solving the Crisis in Big-Bang Nucleosynthesis by the Radiative Decay of an Exotic Particle

Abstract

We discuss a new mechanism which can solve the crisis in standard big-bang nucleosynthesis. A long-lived particle $X$ ($10^{4}sec\lesssim {\tau }_X\lesssim 10^{6}sec$) which decays into photon(s) will induce cascade photons, and destroy significant amounts of D and ${}^3$He without destroying ${}^4$He or too much ${}^7$Li. We numerically investigate this process and derive a constraint on the properties of $X$ such that the theoretical values of the primordial light-element abundances agree with observation. We also present some candidates for the unstable particle $X$.

References in corpus (9)

• Big-Bang Nucleosynthesis and the Baryon Density of the Universe
• Gravitino Production in the Inflationary Universe and the Effects on Big-Bang Nucleosynthesis
• On the Abundance of Primordial Helium
• Big Bang Nucleosynthesis in Crisis?
• Electromagnetic Cascade in the Early Universe and its Application to the Big-Bang Nucleosynthesis
• Assessing Big-Bang Nucleosynthesis
• Primordial Nucleosynthesis with a Decaying Tau Neutrino
• Predicting Big Bang Deuterium
• Generic Evolution Of Deuterium And Helium-3

Cited by in corpus (12)

• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• Review of Big Bang Nucleosynthesis and Primordial Abundances
• Radiative Decay of a Long-Lived Particle and Big-Bang Nucleosynthesis
• Third Generation Familons, B Factories, and Neutrino Cosmology
• Big Bang Nucleosynthesis with Bound States of Long-lived Charged Particles
• Big Bang Nucleosynthesis and Lepton Number Asymmetry in the Universe
• Effect of Long-lived Strongly Interacting Relic Particles on Big Bang Nucleosynthesis
• Big Bang Nucleosynthesis with Matter--Antimatter Domains
• General limit on the relation between abundances of D and ${}^7$Li in big bang nucleosynthesis with nucleon injections
• Destruction of 7Be in big bang nucleosynthesis via long-lived sub-strongly interacting massive particles as a solution to the Li problem
• Massive Decaying Tau Neutrino and Big Bang Nucleosynthesis
• Cosmological Deuterium Production in Non-Standard Scenarios