Increasing the effective number of neutrinos with decaying particles

Kazuhide Ichikawa, Masahiro Kawasaki, Kazunori Nakayama, Masato Senami, Fuminobu Takahashi

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

Abstract

We present a model of decaying particles to increase the effective number of neutrinos NV after big bang nucleosynthesis but before the structure formation begins. We point out that our scenario solves the discrepancy between the constraints on NV from these two epochs, As an example, we consider saxion decay into two axions.

Original languageEnglish
Title of host publicationParticles, Strings, and Cosmology - 13th International Symposium on Particles, Strings, and Cosmology, PASCOS 2007
Pages413-416
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event13th International Symposium on Particles, Strings and Cosmology, PASCOS 2007 - London, United Kingdom
Duration: 2007 Jul 22007 Jul 7

Publication series

NameAIP Conference Proceedings
Volume957
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other13th International Symposium on Particles, Strings and Cosmology, PASCOS 2007
CountryUnited Kingdom
CityLondon
Period07/7/207/7/7

Keywords

  • Axions
  • Cosmological neutrinos
  • Cosmologies of theories beyond the standard model

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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