Observation of a Broad Structure at an Invariant Massof 4.32 GeV in the Reaction e+e- to pi+pi-psi(2S) Measured at BaBar
Conference
·
· Phys.Rev.Lett.98:212001,2007
OSTI ID:894565
The authors measure the cross section for 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 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. This structure is not compatible with the Y(4260) previously reported by this experiment. A single resonance is adequate to describe the cross-section in the low-energy region (< 5.7 GeV).
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 894565
- Report Number(s):
- SLAC-PUB-12155; hep-ex/0610057; TRN: US0700182
- Journal Information:
- Phys.Rev.Lett.98:212001,2007, Conference: Contributed to 33rd International Conference on High Energy Physics (ICHEP 06), Moscow, Russia, 26 Jul - 2 Aug 2006
- Country of Publication:
- United States
- Language:
- English
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