Study of the e+ e- \u2192 \u3c0+ \u3c0- \u3c00 process using initial state radiation with BABAR
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DOIAbstract
The process e+ e- \u2192 \u3c0+ \u3c0- \u3c00 \u3b3 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 3\u3c0 mass spectrum we have obtained the products of branching fractions for the \u3c9 and \u3c6 mesons, B(\u3c9 \u2192 e+ e-) B(\u3c9 \u2192 3\u3c0) = (6.70 \ub1 0.06 \ub1 0.27) 7 10 -5 and B(\u3c6 \u2192 e+e-)B(\u3c6 \u2192 3\u3c0) = (4.30 \ub1 0.08 \ub1 0.21) 7 10-5 and evaluated the e+ e- \u2192 \u3c0+ \u3c0- \u3c00 cross section for the e+ e - center-of-mass energy range 1.05 to 3.00 GeV. About 900 e + e- \u2192 J/\u3c8\u3b3 \u2192 \u3c0+ \u3c0- \u3c00 \u3b3 events have been selected and the branching fraction...
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