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Observation of e(+)e(-) -> eta ' J/psi center-of-mass energies between 4.189 and 4.600 GeV
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 3, 032009Article in journal (Refereed) Published
Abstract [en]

The process e(+)e(-) -> eta' J/psi is observed for the first time with a statistical significance of 8.6 sigma at center-of-mass energy root s = 4.226 GeV and 7.3 sigma at root s = 4.258 GeV using data samples collected with the BESIII detector. The Born cross sections are measured to be (3.7 +/- 0.7 +/- 0.3) and (3.9 +/- 0.8 +/- 0.3) pb at root s = 4.226 and 4.258 GeV, respectively, where the first errors are statistical and the second systematic. Upper limits at the 90% confidence level of the Born cross sections are also reported at other 12 energy points.

Place, publisher, year, edition, pages
2016. Vol. 94, no 3, 032009
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-307887DOI: 10.1103/PhysRevD.94.032009ISI: 000381893400002OAI: oai:DiVA.org:uu-307887DiVA: diva2:1049048
Funder
Swedish Research Council
Available from: 2016-11-23 Created: 2016-11-22 Last updated: 2016-11-23Bibliographically approved

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