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Observation of J/psi -> p(p)over-bara(0)(980) at BESIII
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2014 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 90, no 5, 052009- p.Article in journal (Refereed) Published
Abstract [en]

Using 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/psi -> p (p) over bara(0)(980) -> pi(0)eta with a significance of 6.5 sigma (3.2 sigma including systematic uncertainties). The product branching fraction of J/psi -> p (p) over bara(0)(980) -> p (p) over bara(0)pi(0)eta is measured to be (6.8 +/- 1.2 +/- 1.3) x 10(-5), where the first error is statistical and the second is systematic. This measurement provides information on the a(0) production near threshold coupling to p (p) over bar and improves the understanding of the dynamics of J/psi decays to four-body processes.

Place, publisher, year, edition, pages
2014. Vol. 90, no 5, 052009- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-235630DOI: 10.1103/PhysRevD.90.052009ISI: 000342664500001OAI: oai:DiVA.org:uu-235630DiVA: diva2:762327
Available from: 2014-11-11 Created: 2014-11-06 Last updated: 2017-12-05Bibliographically approved

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Johansson, TordKupsc, AndrzejSchönning, KarinWolke, Magnus

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