Observation of e(+)e(-) -> eta ' J/psi center-of-mass energies between 4.189 and 4.600 GeV
2016 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 94, no 3, 032009Article in journal (Refereed) Published
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
IdentifiersURN: urn:nbn:se:uu:diva-307887DOI: 10.1103/PhysRevD.94.032009ISI: 000381893400002OAI: oai:DiVA.org:uu-307887DiVA: diva2:1049048
FunderSwedish Research Council