This sounds too weird for me. -----Original Message----- From: Saibal Mitra [mailto:[EMAIL PROTECTED] Sent: Monday, October 10, 2005 4:54 PM To: everything Subject: Tegmark's prediction of neutrino masses
Since we are discussing neutrinos, I thought it is fun to mention antropic constraints on neutrino masses derived by Tegmark, see here: http://arxiv.org/abs/astro-ph/0304536 Anthropic predictions for neutrino masses Authors: Max Tegmark (MIT), Alexander Vilenkin (Tufts), Levon Pogosian (Tufts) Categories: astro-ph Comments: Revised to match accepted PRD version. Added references, discussion of very heavy neutrinos, analytic growth factor fit. 9 pages, 4 figs. Color figs and links at this http URL Journal-ref: Phys.Rev. D71 (2005) 103523 It is argued that small values of the neutrino masses may be due to anthropic selection effects. If this is the case, then the combined mass of the three neutrino species is expected to be ~1eV, neutrinos causing a non-negligible suppression of galaxy formation. http://arxiv.org/abs/astro-ph/0404497 Anthropic predictions for vacuum energy and neutrino masses Authors: Levon Pogosian, Alexander Vilenkin, Max Tegmark Categories: astro-ph gr-qc hep-th Comments: 9 pages, 4 figures Journal-ref: JCAP 0407 (2004) 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. ------------------------------------------------- Defeat Spammers by launching DDoS attacks on Spam-Websites: http://www.hillscapital.com/antispam/
