Preface: special topic on physics of the BESⅢ experimentOA

作者：Yifang Wang

来源：National Science Review, 2021, 8(11): 5.

<正>The Beijing electron positron collider (BEPC) was constructed in the 1980s and its upgraded version (BEPCⅡ) with a centerof-mass energy region of 2-5 GeV and a maximum luminosity of 1 × 1033 cm-2 s-1 started operation in 2008.The colliding events are recorded by a newly designed detector,called the Beijing spectrometer (BESⅢ),based on state-of-theart technologies.Physicists working at the BESⅢ experiment formed the BESⅢ Collaboration in 2005,which is a large international collaboration consisting of more than 500 physicists from 80 institutions in 17 countries.Over the course of more than ten years,about 400 physics papers have been published in internationally renowned journals covering a large variety of physics topics and notable achievements,including the following.