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From: ethan@utastro.UUCP (Ethan Vishniac)
Newsgroups: net.physics,net.astro.expert
Subject: number of neutrinos
Message-ID: <411@utastro.UUCP>
Date: Wed, 24-Jul-85 11:19:18 EDT
Article-I.D.: utastro.411
Posted: Wed Jul 24 11:19:18 1985
Date-Received: Fri, 26-Jul-85 03:03:34 EDT
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Organization: U. Texas, Astronomy, Austin, TX
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Xref: linus net.physics:2717 net.astro.expert:87

[]
I was thumbing through the New Scientist yesterday and came across a
brief article about a talk by Rubbia.  It claimed that the decay widths
of Z and W particles determined at CERN could now be used to limit the
number of neutrino species to a number "consistent with cosmological
predictions" (based on primordial nucleosynthesis).  If this is true
it's exciting since it would be the first cosmological prediction concerning
particle physics that has ever been confirmed.  The particle physicists
here seem to all be on vacation.  Has anyone else heard this rumor?

-- 

"Don't argue with a fool.      Ethan Vishniac
 Borrow his money."            {charm,ut-sally,ut-ngp,noao}!utastro!ethan
                               Department of Astronomy
                               University of Texas