Observation of the electromagnetic doubly OZI-suppressed decay J/ψ → фπ0 /M. Ablikim, M.  N. Achasov, X.  C. Ai [et.al.]

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Другой Автор
Ablikim, M.
Achasov, M. N.
Ai, X. C.
Chelkov, G. A.
Источник
Physical Review D 2015 Vol. 91, № 11. P. 112001-1-112001-7
Аннотация
Using a sample of 1.31 billion J/ψ events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay J/ψ→ϕπ0, which is the first evidence for a doubly Okubo–Zweig–Iizuka suppressed electromagnetic J/ψ decay. A clear structure is observed in the K+K− mass spectrum around 1.02  GeV/c2, which can be attributed to interference between J/ψ→ϕπ0 and J/ψ→K+K−π0 decays. Due to this interference, two possible solutions are found. The corresponding measured values of the branching fraction of J/ψ→ϕπ0 are [2.94±0.16(stat)±0.16(syst)]×10−6 and [1.24±0.33(stat)±0.30(syst)]×10−7.
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160412|2015    xxu     s         a eng dd
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$a Observation of the electromagnetic doubly OZI-suppressed decay J/ψ → фπ0 $c M. Ablikim, M.  N. Achasov, X.  C. Ai [et.al.]
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$a Using a sample of 1.31 billion J/ψ events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay J/ψ→ϕπ0, which is the first evidence for a doubly Okubo–Zweig–Iizuka suppressed electromagnetic J/ψ decay. A clear structure is observed in the K+K− mass spectrum around 1.02  GeV/c2, which can be attributed to interference between J/ψ→ϕπ0 and J/ψ→K+K−π0 decays. Due to this interference, two possible solutions are found. The corresponding measured values of the branching fraction of J/ψ→ϕπ0 are [2.94±0.16(stat)±0.16(syst)]×10−6 and [1.24±0.33(stat)±0.30(syst)]×10−7.
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$a Ablikim, M.
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$a Achasov, M. N.
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$a Ai, X. C.
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$a Chelkov, G. A.
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$a Томский государственный университет $b Радиофизический факультет $b Научные подразделения РФФ
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Предмет
статьи, опубликованные в зарубежных изданиях
Резюме
Using a sample of 1.31 billion J/ψ events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay J/ψ→ϕπ0, which is the first evidence for a doubly Okubo–Zweig–Iizuka suppressed electromagnetic J/ψ decay. A clear structure is observed in the K+K− mass spectrum around 1.02  GeV/c2, which can be attributed to interference between J/ψ→ϕπ0 and J/ψ→K+K−π0 decays. Due to this interference, two possible solutions are found. The corresponding measured values of the branching fraction of J/ψ→ϕπ0 are [2.94±0.16(stat)±0.16(syst)]×10−6 and [1.24±0.33(stat)±0.30(syst)]×10−7.