Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR

Details Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR

2004-08-16

arxiv.org/abs/hep-ex/0408078v1

Phys.Rev.D70:072004,2004

Physics

High Energy Physics

High Energy Physics - Experiment

21 pages, 37 postscript figues, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.70.072004

The process e+e- --> pi+ pi- pi0 gamma has been studied at a center-of-mass energy near the Y(4S) resonance using a 89.3 fb-1 data sample collected with the BaBar detector at the PEP-II collider. From the measured 3pi mass spectrum we have obtained the products of branching fractions for the omega and phi mesons, B(omega --> e+e-)B(omega --> 3pi)=(6.70 +/- 0.06 +/- 0.27)10-5 and B(phi --> e+e-)B(phi --> 3pi)=(4.30 +/- 0.08 +/- 0.21)10-5, and evaluated the e+e- --> pi+ pi- pi0 cross section for the e+e- center-of-mass energy range 1.05 to 3.00 GeV. About 900 e+e- --> J/psi gamma --> pi+ pi- pi0 gamma events have been selected and the branching fraction B(J/psi --> pi+ pi- pi0)=(2.18 +/- 0.19)% has been measured.

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