Chinese Physics C > 1999, Vol. 23 > Issue(8): 745-752

Study of J/ψ、γπ⁰π⁰at BES

BES Collaboration

Institute of High Anergy Physics, CAS, Beijing 100039

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Abstract：
The decay J/ψ→γπ ⁰π ⁰is studied with 7.0×10 ⁶produced J/ψ events collected by the Bening Spectrometer(BES) with the tugger mode senseuve to both chmped and neutral final state at the Bening Electron-Positron Collider(BEPC), The evidences for the existence of f _J(1710) and E(2230) in this channel are presented, and the corresponding masses as wen asthe product branching ratios are obtained.

References

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Bai J Z et al. BES Collaboration. Phys. Rev Lett,1996, 76:35022 Huang T et al. Phys. bett. 1996, B380:1893 Weingarten D Nucl. Phys.(Proc、Suppl.), 1994, B34:294 Particle Data Group, Barnett R M et al. Phys. Rev., 1996,D54: 1 5 Anisovich V et al. Phys. Lett,1994, B323:233; Amsler C et al. phys, Lett 1994, B342:433; 1992, B291: 347; 1994,B340:259 6 Amsler C, Close F E. Phys. Lett. 1995, B353:385; Phys Rev.1996, D53:2957 Ishikawa K Phys. Rev. Lett.1981, 46:978; Chanowitz M.Phys. Rev. Lett,1981, 46:9818 Bai J Z et al. Phys. Rev. Lett., 1996, 77:39599 Baltrusaitis R M et al. Phys. Rev Lett. 1986, 56:10 7; Einsweiler K F.Ph.D Thesis , SLAC ffeport No. SLAC–272, 1984(unpublished) 10 Kpke L, Wermes N. Phys. Rep, 1989, 174:6711 Bai J Z et al. Nucl. Instr. Meth., 1994, A344:319

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BES Collaboration. Study of J/ψ、γπ ⁰π ⁰at BES[J]. Chinese Physics C, 1999, 23(8): 745-752.

BES Collaboration. Study of J/ψ、γπ ⁰π ⁰at BES[J]. Chinese Physics C, 1999, 23(8): 745-752. shu

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Received: 1998-06-15
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of J/ψ、γπ⁰π⁰at BES

BES Collaboration

Institute of High Anergy Physics, CAS, Beijing 100039

Received Date:1998-06-15
Accepted Date:1900-01-01
Available Online:1999-08-05

Abstract:The decay J/ψ→γπ⁰π⁰is studied with 7.0×10⁶produced J/ψ events collected by the Bening Spectrometer(BES) with the tugger mode senseuve to both chmped and neutral final state at the Bening Electron-Positron Collider(BEPC), The evidences for the existence of f_J(1710) and E(2230) in this channel are presented, and the corresponding masses as wen asthe product branching ratios are obtained.