Article View: sci.physics.cond-matter
Article #42Re: Neutrino Masses
From: Joseph.D.Warner
Date: Tue, 17 Jul 2001 20:35
Date: Tue, 17 Jul 2001 20:35
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Matt Carey wrote: > <snip> > 2) What is the "Room Temperature" of the universe? The bright > boys at Bell Labs measured the background radiation of the universe > at about 3K (2.77K?) as I recall. About 0.01 what we consider > room temperature. kbT is about 1/40 eV at RT, so the background > "temperature" of the universe would be about 1/4000 eV. Hardly > enough to make a neutrino relativistic. No one, as I understand, has said that neutrinos are in thermal equalibrium with rest of the universe
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1141dc,f4dfcde22ee4c9c6 X-Google-Attributes: gid1141dc,public X-Google-Thread: 100065,f4dfcde22ee4c9c6 X-Google-Attributes: gid100065,public X-Google-Thread: 104752,f4dfcde22ee4c9c6 X-Google-Attributes: gid104752,public X-Google-Thread: 106ae0,f4dfcde22ee4c9c6 X-Google-Attributes: gid106ae0,public X-Google-ArrivalTime: 2001-07-17 13:55:27 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!news-out.visi.com!hermes.visi.com!usenet.INS.cwru.edu!news.grc.nasa.gov!newsread.lerc.nasa.gov!not-for-mail From: "Joseph.D.Warner" <jwarner@grc.nasa.gov> Newsgroups: sci.physics.cond-matter,sci.materials,sci.mech.fluids,fj.sci.matter Subject: Re: Neutrino Masses Date: Tue, 17 Jul 2001 16:35:50 -0400 Organization: NASA Glenn Research Center Lines: 16 Message-ID: <3B54A1A6.BE529082@grc.nasa.gov> References: <a786eec.0107151054.5e5c867b@posting.google.com> <3B51F2D9.CEB79A8B@hate.spam.net> <3B5390E4.6056173A@ieee.org> Reply-To: Warner@grc.nasa.gov NNTP-Posting-Host: jwarner.lerc.nasa.gov Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.75 [en] (Win98; U) X-Accept-Language: en