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 · Tue Oct 31 00:00:00 EST 2006 · Phys.Rev.Lett.98:212001,2007

OSTI ID:894565

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 ; Abrams, G S

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

Related Subjects

43 PARTICLE ACCELERATORS
CROSS SECTIONS
HIGH ENERGY PHYSICS
RESONANCE
STORAGE RINGS
Experiment-HEP
HEPEX