Observation of e+eηJ/ψ at center-of-mass energies between 4.189 and 4.600 GeV

M. Ablikim et al. (BESIII Collaboration)
Phys. Rev. D 94, 032009 – Published 23 August 2016

Abstract

The process e+eηJ/ψ is observed for the first time with a statistical significance of 8.6σ at center-of-mass energy s=4.226GeV and 7.3σ at s=4.258GeV 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 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.

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  • Received 12 May 2016

DOI:https://doi.org/10.1103/PhysRevD.94.032009

© 2016 American Physical Society

Physics Subject Headings (PhySH)

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  1. Physical Systems
Particles & Fields

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Vol. 94, Iss. 3 — 1 August 2016

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