Solving the cosmic lithium problems with primordial late-decaying particles

Daniel Cumberbatch, Kazuhide Ichikawa, Masahiro Kawasaki, Kazunori Kohri, Joseph Silk, and Glenn D. Starkman
Phys. Rev. D 76, 123005 – Published 6 December 2007

Abstract

We investigate the modifications to predictions for the abundances of light elements from standard big-bang nucleosynthesis when exotic late-decaying particles with lifetimes exceeding 1sec are prominent in the early Universe. Utilizing a model-independent analysis of the properties of these long-lived particles, we identify the parameter space associated with models that are consistent with all observational data and hence resolve the much discussed discrepancies between observations and theoretical predictions for the abundances of Li7 and Li6.

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  • Received 16 August 2007

DOI:https://doi.org/10.1103/PhysRevD.76.123005

©2007 American Physical Society

Authors & Affiliations

Daniel Cumberbatch1, Kazuhide Ichikawa2, Masahiro Kawasaki2, Kazunori Kohri3,4, Joseph Silk1, and Glenn D. Starkman1,5

  • 1Astrophysics Department, University of Oxford, Oxford, OX1 3RH, United Kingdom
  • 2Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
  • 3Physics Department, Lancaster University, Lancaster, LA1 4YB, United Kingdom
  • 4Harvard-Smithsonian, Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
  • 5Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079, USA

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Issue

Vol. 76, Iss. 12 — 15 December 2007

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