Abstract
The process e+e−→π+π−π0γ has been studied at a center-of-mass energy near the Υ(4S) resonance using a 89.3 fb−1 data sample collected with the BABAR detector at the PEP-II collider. From the measured 3π mass spectrum we have obtained the products of branching fractions for the ω and ϕ mesons, B(ω→e+e−)B(ω→3π)=(6.70±0.06±0.27)×10−5 and B(ϕ→e+e−)B(ϕ→3π)=(4.30±0.08±0.21)×10−5 and evaluated the e+e−→π+π−π0 cross section for the e+e− center-of-mass energy range 1.05 to 3.00 GeV. About 900 e+e−→J/ψγ→π+π−π0γ events have been selected and the branching fraction B(J/ψ→π+π−π0)=(2.18±0.19)% has been measured.13 MoreReceived 16 August 2004DOI:https://doi.org/10.1103/PhysRevD.70.072004©2004 American Physical Society
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