Using data samples collected with the BESIII detector operating at the BEPCII collider at 17 center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of e+e−→ηJ/ψ and π0J/ψ. The Born cross sections of these two processes are measured at each center-of-mass energy. The measured energy-dependent Born cross section for e+e−→ηJ/ψ shows an enhancement around 4.2 GeV. The measurement is compatible with an earlier measurement by Belle.
Physical Review D. 2015. Vol. 91, № 11. P.112005-1-112005-12
Language
eng
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Радиофизический факультет
Measurement of the e+e- → ηJ/ψ cross section and search for e+e- → π0J/ψ at center-of-mass energies between 3.810 and 4.600 GeV
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