Hadronic decay of late-decaying particles and big-bang nucleosynthesis

• Published in: Physics letters. B Vol. 625; no. 1; pp. 7 - 12
• Main Authors: Kawasaki, Masahiro, Kohri, Kazunori, Moroi, Takeo
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 06.10.2005; Elsevier Science
• Subjects: Exact sciences and technology; Nuclear physics; Physics; The physics of elementary particles and fields; 11.30.Pb; 26.35.+c; 98.80.-k; Branching ratio; Upper bound; Lifetime; Nucleosynthesis; Big bang; Early universe; Abundance; Cosmology

We study the big-bang nucleosynthesis (BBN) scenario with late-decaying exotic particles with lifetime longer than ∼1 s. 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 abun...