16-November-2007, 04:11 PM
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Established Member
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Join Date: Jun 2005
Location: Miami
Posts: 601
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Physicists spot unusual charged meson
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Physicists at the Belle experiment at the KEK laboratory in Japan have discovered a new particle that provides the best evidence yet that some mesons contain four quarks rather than the usual two.
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http://physicsworld.com/cws/article/...E48C7166675B96
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...the Belle physicists believe that it could be a four-quark state comprising up, anti-down, charm and anti-charm quarks.
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