Constraints on neutrino masses from WMAP5 and BBN in the lepton asymmetric universe

Maresuke Shiraishi, Kazuhide Ichikawa, Kiyotomo Ichiki +2

In this paper, we put constraints on neutrino properties such as mass $m_{\nu }$ and degeneracy parameters ${\xi }_i$ from WMAP5 data and light element abundances by using a Markov chain Mon…