首次探测到双粲重子Ξ_(cc)^(++)  

First Observation of Doubly Charmed Baryon Ξ_(cc)^(++)

作　　者：高原宁[1] Gao Yuanning(Center for High Energy Physics, Tsinghua University, Beijing 100084)

机构地区：[1]清华大学高能物理研究中心,北京100084

出　　处：《前沿科学》2018年第1期37-40,共4页Frontier Science

基　　金：国家自然科学基金资助项目,项目批准号:11075084,11161140590,11575091;国家重点研发计划资助项目,项目编号:2017YFA0402100

摘　　要：2017年7月6日,欧洲核子研究中心大型强子对撞机底夸克探测器实验宣布发现双粲重子Ξ_(cc)^(++),该粒子具有两个单位电荷,几乎是质子质量的4倍。该粒子由两个粲夸克和一个顶夸克组成,预期其内部结构迥异于以往发现的重子,为检验强相互作用的基本理论量子色动力学提供一个独特的标本。July 6, 2017, the Large Hadron Collider Beauty Experiment （LHCb） at European Organization 【I】cc^＋＋ of Nuclear Research （CERN） has reported the first detection of the doubly charmed baryon 【I】cc^＋＋ . The newly discovered particle has two unit of electric charge. Its mass is about four times as heavier as the proton. Containing two charm quarks and one up quark, 【I】cc^＋＋ is expected to have a very different structure than those previously discovered baryons, which provides a unique system for testing Quantum Chromodynamics.

关 键 词：夸克模型 双粲重子 LHCb实验 

分 类 号：O572.2[理学—粒子物理与原子核物理]