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.
出处
《高能物理与核物理》
EI
CSCD
北大核心
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~~
