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From: pmk@prometheus.UUCP (Paul M Koloc)
Newsgroups: net.physics
Subject: Re: Re: Do Positrons Have Negative Mass?
Message-ID: <174@prometheus.UUCP>
Date: Mon, 26-Aug-85 06:11:54 EDT
Article-I.D.: promethe.174
Posted: Mon Aug 26 06:11:54 1985
Date-Received: Wed, 28-Aug-85 02:39:33 EDT
References: <636@astrovax.UUCP> <967@brl-tgr.ARPA>
Organization: Prometheus II Ltd., College Park, MD
Lines: 38

> > 	There is a theorem of particle physics which states that all
> > particles with a negative mass travel backwards in time.  ...
> > All this comes from charge, parity, and time symmetry arguements.
> 
> How do you relate mass to CPT?

I don't know if there exists a theorem, but, mass is related to gravity.
Terrific!  So what.  Well, gravity is weakly coupled to time.

Gravitation field density affects the rate of time flow,
and, if the field (mass) density could be infinite then rate of time 
flow would zero.  But reverse????   No chance.

From another perspective.
My guess is that "negative gravity" would be repulsive (by definition?)
in our time orientation.  By reversing the direction of time (playing
a movie of such an event backwards) a "negative gravity event" would 
transform to a "positive gravity" one.  Neat, huh?

Dumb, it appears that the positron (with its hypothetical negative mass)
"keeps up with us in time".  If it were traveling backwards in time 
then, except for a single "collision time frame" the the NM positron 
would not exist in our space-time world.  

My conclusion is that positrons have normal mass, and excluding a 
"single time frame event" any coupling of mass to Time direction is 
moot.  It is self contradictory  or at least it doesn't appear 
logical to me.  If, however, positrons are experimentally proven to 
have "negative mass", then I would be willing to reconsider my 
position, ----  but give me a couple of weeks advanced notice before
publishing.              :-)
                         :-)
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