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Observation of J/ψ→p¯pa0(980) at BESIII M. Ablikim, M. N. Achasov, X. C. Ai [et al.]

Contributor(s): Ablikim, M | Ai, X. C | Chelkov, G. A | Achasov, M. NMaterial type: ArticleArticleSubject(s): BEPCII, коллайдер | BESIII, детекторGenre/Form: статьи в журналах Online resources: Click here to access online In: Physical Review D Vol. 90, № 5. P. 052009-1-052009-8Abstract: Using 2.25×108J/ψ events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/ψ→p¯pa0(980), a0(980)→π0η with a significance of 6.5σ (3.2σ including systematic uncertainties). The product branching fraction of J/ψ→p¯pa0(980)→p¯pπ0η is measured to be (6.8±1.2±1.3)×10−5, where the first error is statistical and the second is systematic. This measurement provides information on the a0 production near threshold coupling to p¯p and improves the understanding of the dynamics of J/ψ decays to four-body processes.
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Using 2.25×108J/ψ events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/ψ→p¯pa0(980), a0(980)→π0η with a significance of 6.5σ (3.2σ including systematic uncertainties). The product branching fraction of J/ψ→p¯pa0(980)→p¯pπ0η is measured to be (6.8±1.2±1.3)×10−5, where the first error is statistical and the second is systematic. This measurement provides information on the a0 production near threshold coupling to p¯p and improves the understanding of the dynamics of J/ψ decays to four-body processes.

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