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April 30, 2003

Charming, Strange Exotic

BaBar is reporting the observation of a narrow J P=0 +J^P=0^+ resonance of mass 2.32 GeV/c 2c^2. I haven’t looked at the paper, but this sounds very strange. It decays into D s +π 0D_s^+ \pi^0. But it’s well above the (combined) masses of the charm and strange quarks. So it can’t be an ordinary meson. They suggest the possibility of a qqq¯q¯qq\overline{q}\overline{q} exotic.

Posted by distler at April 30, 2003 10:08 PM

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