期刊
PHYSICAL REVIEW LETTERS
卷 98, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.212001
关键词
-
资金
- Science and Technology Facilities Council [PP/E000444/1] Funding Source: researchfish
We present a measurement of the cross section of the process e(+)e(-)->pi(+)pi(-)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(+)e(-) storage rings. The study is based on 298 fb(-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.
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