Details

Autor(en) / Beteiligte

• Aubert, B.
• Barate, R.
• Bona, M.
• Boutigny, D.
• Couderc, F.
• Karyotakis, Y.
• Lees, J. P.
• Poireau, V.
• Tisserand, V.
• Zghiche, A.
• Grauges, E.
• Palano, A.
• Chen, J. C.
• Qi, N. D.
• Rong, G.
• Wang, P.
• Zhu, Y. S.
• Eigen, G.
• Ofte, I.
• Stugu, B.

Titel

Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c{sup 2} in the Reaction e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) Measured at BABAR

Ist Teil von

• Physical review letters, 2007-05, Vol.98 (21)

Ort / Verlag

United States

Erscheinungsjahr

2007

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We present a measurement of the cross section of the process e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the SLAC PEP-II e{sup +}e{sup -} storage rings. The study is based on 298 fb{sup -1} of data recorded with the BABAR detector. A structure is observed in the cross section not far above threshold, near 4.32 GeV. We also investigate the compatibility of this structure with the Y(4260) previously reported by this experiment.