Four quarks?

Joseph S. Barrera III jsb at polymathy.org
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?

-------- Original Message --------
Subject: 	Latest PhysicsWeb Summaries
Date: 	Sat, 15 Nov 2003 03:01:00 +0000 (GMT)
From: 	e-alert at physicsweb.org
Reply-To: 	mags-return-joe=barrera.org at wigner.ioppublishing.com
Organization: 	Institute of Physics Publishing
To: 	<joe at barrera.org>



  Latest PhysicsWeb Summaries

------------------------------------------------------------------------

SPONSOR: VAT Vacuum Products Ltd

The new Series 54 all-metal right angle valve from VAT. DN40 CF valves 
use a stainless steel VATRING in place of the traditional copper pad 
system. They close to a mechanical stop, are not torque sensitive and 
offer a huge conductance of 45 l/s
www.vatvalve.com

------------------------------------------------------------------------


    News

New particle turns up in Japan 
<http://physicsweb.org/article/news/7/11/7> *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 (arxiv.org/abs/hep-ex/0309032; /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".

------------------------------------------------------------------------

-- 
This alert was generated according to your PhysicsWeb alert settings.
To change your alert settings or unsubscribe from this service, please
visit the User Options page on
PhysicsWeb at http://physicsweb.org/users/options/alert


-- 
Chestnut brown canary
Ruby throated sparrow
Sing the song, don't be long,
Thrill me to the marrow




More information about the FoRK mailing list