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This review analyzes the discoveries and contributions of the BEPC/BES facilities to high-energy physics over four decades.

February 22, 2026Open Access

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Forty Years of BEPC/BES

HCHesheng ChenCentral South University

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This review analyzes the discoveries and contributions of the BEPC/BES facilities to high-energy physics over four decades.
Reviewed historical findings related to the J particle.
Examined advancements in charm physics research.
Analyzed the upgrades to BEPCII/BESIII and their significance.
BEPC's achievements solidified its reputation in experimental charm physics.
The discovery of the J particle marked a milestone in high-energy physics.
Subsequent facilities and experiments in China accelerated scientific progress in this field.

Abstract

This paper reviews the discovery of the J particle and examines its impact on high-energy physics in China. Charm physics emerged as the primary research focus of the Beijing Electron-Positron Collider (BEPC/BES) and its upgraded successor, BEPCII/BESIII. Through its remarkable achievements in experimental charm physics, BEPC has remained a vital and enduring facility in its energy region. Following the success of BEPC, the non-accelerator physics experiments and the large multidisciplinary scientific facilities in China have rapidly developed, yielding many significant results.

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Forty Years of BEPC/BES

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