D_(sJ)(2632)强衰变的研究(英文)  

Study on Strong Decays of D_(sJ)(2632)

作　　者：柯红卫[1] 于彦明[1] 丁亦兵[2] 郭新恒[3] 金洪英[4] 李学潜[1] 沈彭年[5] 王国利[6] 

机构地区：[1]南开大学物理学院,天津300071 [2]中国科学院研究生院物理系,北京100049 [3]北京师范大学低能核物理研究所,北京100875 [4]浙江大学现代物理学院,杭州310027 [5]中国科学院高能物理研究所,北京100049 [6]哈尔滨工业大学物理系,哈尔滨150006

出　　处：《高能物理与核物理》2006年第10期936-943,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10475042)资助~~

摘　　要：SELEX合作组发现的DsJ(2632)引起了很多的讨论,同时也带来了激烈的争论．它的自旋宇称还没有最后确定,如果它真的存在,它的夸克结构可能是奇特的．以前有的文献假定DsJ(2632)是1-的径向激发态,我们假定它可能是夸克结构为qq,JP为2+的基态或者0+DsJ(2317)的第一径向激发态,用Bethe-Salpeter方程重新计算了它的衰变宽度．计算结果表明,理论值和实验数据还是存在尖锐的矛盾．The resonance Dsj （2632） observed by SELEX, has attracted great interests and meanwhile brought up serious dispute. Its spin-parity, so far has not finally determined and if it exists, its quark-structure might be exotic. Following the previous literature where Dsj（2632） is assumed to be a radial-excited state of 1-, we consider the possibilities that it might be a qq^- ground state of 2^＋ or the first radial-excited state of 0^＋ Dsj （2317） and re-calculate its strong decay widths in terms of the Bethe-Salpeter equation. Our results indicate that there still is a sharp discrepancy between the theoretical evaluation and data.

关 键 词：Dsj(2632) 强衰变 BETHE-SALPETER方程 

分 类 号：O571.3[理学—粒子物理与原子核物理]