Anthropic predictions for vacuum energy and neutrino masses

Details Anthropic predictions for vacuum energy and neutrino masses Anthropic predictions for vacuum energy and neutrino masses

2004-04-26

arxiv.org/abs/astro-ph/0404497v1

JCAP 0407:005,2004

Astronomy and Astrophysics

Astrophysics

9 pages, 4 figures

Scientific paper

10.1088/1475-7516/2004/07/005

It is argued that the observed vacuum energy density and the small values of the neutrino masses could be due to anthropic selection effects. Until now, these two quantities have been treated separately from each other and, in particular, anthropic predictions for the vacuum energy were made under the assumption of zero neutrino masses. Here we consider two cases. In the first, we calculate predictions for the vacuum energy for a fixed (generally non-zero) value of the neutrino mass. In the second we allow both quantities to vary from one part of the universe to another. We find that the anthropic predictions for the vacuum energy density are in a better agreement with observations when one allows for non-zero neutrino masses. We also find that the individual distributions for the vacuum energy and the neutrino masses are reasonably robust and do not change drastically when one adds the other variable.

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