Marc Pelizaeus - Meson
Marc Pelizaeus - Meson
Marc Pelizaeus - Meson
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Confirmation of Y(4260) from CLEO-III / CLEO-c<br />
• ISR production of π + π - J/ψ events<br />
in CLEO-III data near √s=10.58 GeV<br />
CLEO-III: 13.3 fb -1<br />
Preliminary<br />
• Enhanced cross sections at<br />
hep-ex/0602034<br />
4.26 GeV from CLEO-c scan hep-ex/0602034<br />
+<br />
σ(<br />
e e<br />
−<br />
+ −<br />
→π<br />
π J ψ)<br />
= (58<br />
+ 12<br />
−10 ±<br />
N=37 (11 σ)<br />
4)pb<br />
σ(<br />
e<br />
+<br />
e<br />
−<br />
0 0<br />
→π<br />
π J ψ)<br />
= (23<br />
+ 12<br />
−8<br />
N=8 (5.1 σ)<br />
± 1)pb<br />
M. Pelizäus, Charm and Charmonium Spectroscopy<br />
29
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