Effects of sterile neutrino and extra-dimension on big bang nucleosynthesis

Dukjae Jang, Motohiko Kusakabe, Myung-Ki Cheoun

By assuming the existence of extra-dimensional sterile neutrinos in big bang nucleosynthesis (BBN) epoch, we investigate the sterile neutrino (${\nu }_{\mathrm{s}}$) effects on the BBN and c…