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Path: utzoo!linus!decvax!harpo!eagle!mhuxl!houxm!houxz!halle1
From: halle1@houxz.UUCP
Newsgroups: net.physics
Subject: Re: A question on photon decay
Message-ID: <575@houxz.UUCP>
Date: Mon, 7-Nov-83 09:31:22 EST
Article-I.D.: houxz.575
Posted: Mon Nov  7 09:31:22 1983
Date-Received: Tue, 8-Nov-83 21:10:42 EST
References: <195@denelcor.UUCP>
Organization: Bell Labs, Holmdel NJ
Lines: 5
Re: non-zero rest mass of a photon

I recall when studying for my comps a problem to calculate the upper
bound for the mass of a photon.  Using Heisenberg and other stuff,
there is an upper limit - quite small, even on that scale, but non-zero.
I don't remember the details now, but I thought the problem was interesting.
Can anyone supply the details?