Constraints on Lepton Asymmetry from Nucleosynthesis in a Linearly
  Coasting Cosmology
  We study the effect of neutrino degeneracy on primordial nucleosynthesis in a
universe in which the cosmological scale factor evolves linearly with time. The
degeneracy parameter of electron type neutrinos ($\xi_e$) determines the $n/p$
(neutron to proton) ratio, which in turn determines the abundance of $^4$He in
a manner quite distinct from the Standard Scenario. The observed abundances of
$^4$He, $\mathrm{Y}_P$=0.254$\pm$0.003, and the minimum metallicity that is
essential for fragmentation and cooling processes in star forming prestellar
gas clouds (Z = Z$_{cr}$ = 10$^{-6}$Z$_\odot$), constrain the baryon to photon
ratio, $\eta_B$=(3.927$\pm$0.292)10$^{-9}$, corresponding to a baryonic matter
density, $\Omega_B$=0.263$\pm$ 0.026 and $\xi_e$=-2.165$\pm$0.171. This closes
the dynamic mass estimates of matter in the universe by baryons alone. Useful
byproducts are the threshold X(CNO) abundances required to trigger the CNO
cycle in the observed low metallicity stars in the universe.
