首页|Measurement of the $e^+e^- \to \eta J/\psi$ cross section and search for $e^+e^- \to \pi^0 J/\psi$ at center-of-mass energies between 3.810 and 4.600 GeV

Measurement of the $e^+e^- \to \eta J/\psi$ cross section and search for $e^+e^- \to \pi^0 J/\psi$ at center-of-mass energies between 3.810 and 4.600 GeV

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中国科学院科技论文预发布平台

中文摘要

英文摘要

Using data samples collected with the BESIII detector operating at the BEPCII collider at center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of?e+e?→ηJ/ψ?and?π0J/ψ. Statistically significant signals of?e+e?→ηJ/ψ?are observed at?s√?= 4.190, 4.210, 4.220, 4.230, 4.245, 4.260, 4.360 and 4.420 GeV, while no signals of?e+e?→π0J/ψ?are observed. 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, but with a significantly improved precision.

Using data samples collected with the BESIII detector operating at the BEPCII collider at center-of-mass energies from 3.810 to 4.600 GeV, we perform a study ofe+eJ/and0J/. Statistically significant signals ofe+eJ/are observed ats= 4.190, 4.210, 4.220, 4.230, 4.245, 4.260, 4.360 and 4.420 GeV, while no signals ofe+e0J/are observed. The measured energy-dependent Born cross section fore+eJ/shows an enhancement around 4.2~GeV. The measurement is compatible with an earlier measurement by Belle, but with a significantly improved precision.

作者：Ablikim, M. and others

作者单位：

DOI：10.12074/201609.00216V1

学科分类：物理学粒子探测技术、辐射探测技术、核仪器仪表

中文关键词：BESIIIcenter-of-mass

推荐引用：Ablikim, M. and others.Measurement of the $e^+e^- \to \eta J/\psi$ cross section and search for $e^+e^- \to \pi^0 J/\psi$ at center-of-mass energies between 3.810 and 4.600 GeV[EB/OL].(2016-09-09)[2025-08-16].https://chinaxiv.org/abs/201609.00216.点此复制

Measurement of the $e^+e^- \to \eta J/\psi$ cross section and search for $e^+e^- \to \pi^0 J/\psi$ at center-of-mass energies between 3.810 and 4.600 GeV

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