Observation of e(+)e(-)-> eta psi(2S) at Center-of-Mass Energies from 4.236 to 4.600 GeV
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CitationAblikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., ... & Koch, L. (2021). Observation of e+ e−→ ηψ (2S) at center-of-mass energies from 4.236 to 4.600 GeV. Journal of High Energy Physics, 2021(10), 1-21.
Using a total of 5.25 fb(-1) of e(+)e(-) collision data with center-of-mass energies from 4.236 to 4.600 GeV, we report the first observation of the process e(+)e(-)-> eta psi(2S) with a statistical significance of 4.9 standard deviations. The data sets were collected by the BESIII detector operating at the BEPCII storage ring. We measure the yield of events integrated over center-of-mass energies and also present the energy dependence of the measured cross section.
SourceJournal of High Energy Physics
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