🚀 go-pugleaf

In article <16APR199213385899@sscvx1.ssc.gov>, sawyer@sscvx1.ssc.gov (Lee Sawyer) writes...

> The two most important experimental inputs for the color quantum number
>are the antisymmetric baryon wavefunctions for, e.g. the omega; and the "color
>factor" in e+e- --> q \bar{q} which is needed to match the predicted and
>measured cross sections. Coupled with recent LEP results * which show that
>Abelian couplings are excluded by 5 standard deviations, and you are left
>with some very narrow hoops for any new theory to jump through.
> 

There is also new data from several of the LEP experiments on the spin
of the gluon.  By studying the energy distribution of individual jets in 3-jet
events, they show clearly that the gluon is spin-1 and that, for example,
scalar gluons (spin-0) are completely ruled out.  To do this, they rely on the
fact that the third jet comes from either initial- or final-state gluon 
radiation, so that such events carry information about the gluon.  

So any rival theory must include a self-interacting (non-abelian) vector octet
of gauge bosons mediating the color force.  So whatever it is, it will look 
one heck of a lot like QCD.

-Scott

--------------------
Scott I. Chase
SICHASE@CSA2.LBL.GOV