Using a sample of 1.31 × 109 J∕ψ events collected by the BESIII detector at BEPCII during 2009 and 2012, we study the J∕ψ → ωη0πþπ− hadronic process. For the first time, we measure the branching ratio B(J∕ψ → ωη'π+π−) = (1.12 +- 0.02 +- 0.13) × 10−3. We search for the X(1835) state in the η'π+π− invariant mass spectra. No evidence is found and we estimate the upper limit on the branching fraction at 90% confidence level to be B(J∕ψ → ωX(1835); X(1835) → η'π+π−) < 6.2 × 10−5.
Measurement of the branching fraction of J /ψ →ωη′π+π- and search for J /ψ →ωX (1835), X (1835) →η′π+π- decay
Bettoni, D.;Cibinetto, G.;Farinelli, R.;Garzia, I.
;Mezzadri, G.;Savrié, M.;
2019
Abstract
Using a sample of 1.31 × 109 J∕ψ events collected by the BESIII detector at BEPCII during 2009 and 2012, we study the J∕ψ → ωη0πþπ− hadronic process. For the first time, we measure the branching ratio B(J∕ψ → ωη'π+π−) = (1.12 +- 0.02 +- 0.13) × 10−3. We search for the X(1835) state in the η'π+π− invariant mass spectra. No evidence is found and we estimate the upper limit on the branching fraction at 90% confidence level to be B(J∕ψ → ωX(1835); X(1835) → η'π+π−) < 6.2 × 10−5.File in questo prodotto:
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PhysRevD.99.071101.pdf
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