Primordial He' abundance implied by the mirror dark matter interpretation of the DAMA-Libra signal - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




Primordial He' abundance implied by the mirror dark matter interpretation of the DAMA-Libra signal - Astrophysics > Cosmology and Nongalactic Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We compute the primordial mirror helium He- mass fraction emerging from BigBang nucleosynthesis in the mirror sector of particles in the presence ofkinetic mixing between photons and mirror photons. We explore the kineticmixing parameter epsilon values relevant for cosmology and which are alsocurrently probed by the dark matter direct detection experiments. Inparticular, we find that for epsilon \sim 10^{-9}, as suggested by theDAMA-Libra and other experiments, a large He- mass fraction Y {He-} \approx90% is produced. Such a large value of the primordial He- mass fraction willhave important implications for the mirror dark matter interpretation of thedirect detection experiments, as well as for the study of mirror star formationand evolution.



Author: P. Ciarcelluti, R. Foot

Source: https://arxiv.org/



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