Hadronic Decay of Late-Decaying Particles and Big-Bang Nucleosynthesis

Preprint

20 February 2004

preprint
Published by arXiv in arXiv

Abstract

We study the big-bang nucleosynthesis (BBN) scenario with late-decaying exotic particles (with lifetime longer than \sim 1 sec). With a late-decaying particle in the early universe, predictions of the standard BBN scenario can be significantly altered. Therefore, we derive constraints on its primordial abundance. We pay particular attention to hadronic decay modes of such particles. We see that the non-thermal production process of Li6 provides very stringent upper bound on the primordial abundance of late-decaying particles with hadronic branching ratio.

Keywords

LATE DECAYING PARTICLE
BANG NUCLEOSYNTHESIS
NUCLEOSYNTHESIS
HADRONIC DECAY
BIG BANG

All Related Versions

Version 1, 2004-02-20, ArXiv
Version 2, 2004-02-23, ArXiv
Version 3, 2004-06-17, ArXiv
Published version: Physics Letters B, 625 (1-2), 7.

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