Varying leptonic chemical potentials and spatial variation of primordial deuterium at high z

Details Varying leptonic chemical potentials and spatial variation of primordial deuterium at high z Varying leptonic chemical potentials and spatial variation of primordial deuterium at high z

1997-11-18

arxiv.org/abs/astro-ph/9711202v1

New Astron. 4 (1999) 223-230

Astronomy and Astrophysics

Astrophysics

16 pages, latex

Scientific paper

10.1016/S1384-1076(99)00007-X

We try to explain the spatial variation of primordial deuterium suggested by some observations by varying leptonic chemical potentials. The variation of the latter may take place in some scenarios of leptogenesis. The model predicts a large mass fraction of $^4 He$ (35-60%) and $^7 Li$ (up to $10^{-9}$) in deuterium-rich regions. Because of lepton family symmetry, the angular variations of cosmic microwave background radiation can be sufficiently small although still observable in future measurements.

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