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Observation of J/psi -> gamma eta pi(0)
Inst High Energy Phys, Beijing 100049, Peoples R China..
GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
Inst High Energy Phys, Beijing 100049, Peoples R China..
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2016 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 94, no 7, article id 072005Article in journal (Refereed) Published
Abstract [en]

We present the first study of the process J/psi -> gamma eta pi(0) using (223.7 +/- 1.4) x 10(6) J/psi events accumulated with the BESIII detector at the BEPCII facility. The branching fraction for J/psi -> gamma eta pi(0) is measured to be B(J/psi -> gamma eta pi(0)) = (2.14 +/- 0.18(stat) +/- 0.25(syst)) x 10(-5). With a Bayesian approach, the upper limits of the branching fractions B(J/psi -> gamma a(0)(980), a(0)(980) -> eta pi(0)) and B(J/psi -> gamma a(2)(1320), a(2)(1320) -> eta pi(0)) are determined to be 2.5 x 10(-6) and 6.6 x 10(-6) at the 95% confidence level, respectively. All of these measurements are given for the first time.

Place, publisher, year, edition, pages
2016. Vol. 94, no 7, article id 072005
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-307535DOI: 10.1103/PhysRevD.94.072005ISI: 000385633400001OAI: oai:DiVA.org:uu-307535DiVA: diva2:1047356
Funder
German Research Foundation (DFG), CRC-1044Swedish Research Council
Available from: 2016-11-17 Created: 2016-11-17 Last updated: 2016-11-17Bibliographically approved

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Johansson, TordKupsc, AndrzejLi, CuiPettersson, JoachimSchönning, KarinWolke, Magnus
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