Increasing the Effective Number of Neutrinos with Decaying Particles

Details Increasing the Effective Number of Neutrinos with Decaying Particles Increasing the Effective Number of Neutrinos with Decaying Particles

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..957..413i&link_type=abstract

PARTICLES, STRINGS, AND COSMOLOGY: 13th International Symposium on Particles, Strings, and Cosmology-PASCOS 2007. AIP Conferenc

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Origin, Formation, And Abundances Of The Elements, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays, Axions And Other Nambu-Goldstone Bosons

Scientific paper

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

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