Re: Attraction vs repulsion - why does it depend on spin?

francoisbelfort_at_yahoo.fr
Date: 02/28/05 

Date: 28 Feb 2005 13:18:14 -0800

akalaniz@hotmail.com wrote:
> An outline as to why spin is involved in determining whether a force
> between two like charges is attractive or repulsive may be found in
> part I of Zee's, "Quantum Field Theory in a nutshell." The full
reason
> lies in the abstract algebra (group theory) of special relativity and
> SU(N) groups. Wigner published a paper on this in the 1930s.
>
> AA

Hm, ok, but is there a simple way to understand it? This
text is probably out of my reach.
(Spin 2 is already a classical property of gravity (waves) -
independently whether gravitons exist or not.
And spin 2 forces are always attractive, whereas spin 1 mediated forces
can be either attractive or repulsive.)

And is there a reference for the Wigner paper? I'd like to read it ...

FB

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