1-10 Pion-induced Production of the Zc(3900)off a Nuclear Target

• 作者: He Jun
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报：英文版
• 学科: 物理学
• 年，卷（期）: zgkxyjdwlyjs-e_2016,（1）
• 页码范围: 17-18
• 页数: 2页
• 分类号: O4

摘要

The resonant structure Zc^±(3900)was reported recently by the BESIII and Belle Collaborations in the J/ψΠ^±invariant mass spectrum through the electron-positron collision process e+e﹣→J/ψΠ^+Π﹣at√s=4.26 GeV[1,2]and later in an analysis of the CLEO-c data[3].Although such a resonant structure has been established in the experiment,its origin is still in debate.More experimental data will provide more opportunity to understand the structure of the so-called XYZ particles.Most of our experimental knowledge about XYZ particles is from the electron-positron collision or the B decays.In Ref.[4],the cross section of the Zc(3900)photoproduction off a proton was predicted to reach a maximum value of 50 to 100 nb at√srN~10 GeV.This prediction inspired an experiment at COMPASS,where photo-nucleon energies cover the range√srN from 7 to 19 GeV.