Four quarks?

Joseph S. Barrera III jsb at
Fri Nov 14 20:42:21 PST 2003

Gee, back when I was a kid, there were about 3 mesons
and 15 baryons and quarks were just a hypothetical.

I wonder if we're ever going to stop discovering particles?

- Joe

P.S. Why is a four-quark entity a meson and not a baryon? Spin?

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Subject: 	Latest PhysicsWeb Summaries
Date: 	Sat, 15 Nov 2003 03:01:00 +0000 (GMT)
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New particle turns up in Japan 
<> *Nov 14*
The Belle collaboration at the KEK laboratory in Japan has discovered a 
new sub-atomic particle which it is calling the "X(3872)". The particle 
does not fit into any known particle scheme and theorists are 
speculating that it might be a hitherto unseen type of meson that 
contains four quarks (; /Phys. Rev. Lett./ 
to be published). The discovery has been confirmed by the CDF 
collaboration at Fermilab in the US, where the new particle is being 
called the "mystery meson".


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