Stau-catalyzed big-bang nucleosynthesis reactions

Masayasu Kamimura, Yasushi Kino, Emiko Hiyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

We study the new type of big-bang nucleosynthesis (BBN) reactions that are catalyzed by a hypothetical long-lived negatively charged, massive leptonic particle (called X-) such as the supersymmetric(SUSY) particle stau, the scalar partner of the tau lepton. It is known that if the X- particle has a lifetime of τX ≳ 103 s, it can capture a light element previously synthesized in standard BBN and form a Coulombic bound state and induces various types of reactions in which X - acts as a catalyst. Some of these X- -catalyzed reactions have significantly large cross sections so that the inclusion of there actions into the BBN network calculation can markedly change the abundances of some elements. We use a high-accuracy three-body calculation method developed by the authors and provide precise cross sections and rates of these catalyzed BBN reactions for use in the BBN network calculation.

Original languageEnglish
Title of host publicationTours Symposium on Nuclear Physics and Astrophysics - VII
Pages139-144
Number of pages6
DOIs
Publication statusPublished - 2010 Jul 20
Event7th Tours Symposium on Nuclear Physics and Astrophysics - Kobe, Japan
Duration: 2009 Nov 162009 Nov 20

Publication series

NameAIP Conference Proceedings
Volume1238
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other7th Tours Symposium on Nuclear Physics and Astrophysics
CountryJapan
CityKobe
Period09/11/1609/11/20

Keywords

  • Big-bang nucleosynthesis
  • Nuclear reactions
  • Three-body calculation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Kamimura, M., Kino, Y., & Hiyama, E. (2010). Stau-catalyzed big-bang nucleosynthesis reactions. In Tours Symposium on Nuclear Physics and Astrophysics - VII (pp. 139-144). (AIP Conference Proceedings; Vol. 1238). https://doi.org/10.1063/1.3455917