## April 30, 2003

### Charming, Strange Exotic

BaBar is reporting the observation of a narrow $J^P=0^+$ resonance of mass 2.32 GeV/$c^2$. I haven’t looked at the paper, but this sounds very strange. It decays into $D_s^+ \pi^0$. 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 $qq\overline{q}\overline{q}$ exotic.

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

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