CAJ | 학술논문

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q(-q),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.
SELEX합작조발현적DsJ(2632)인기료흔다적토론,동시야대래료격렬적쟁론.타적자선우칭환몰유최후학정,여과타진적존재,타적과극결구가능시기특적.이전유적문헌가정DsJ(2632)시1-적경향격발태,아문가정타가능시과극결구위q(-q),JP위2+적기태혹자0+DsJ(2317)적제일경향격발태,용Bethe-Salpeter방정중신계산료타적쇠변관도.계산결과표명,이론치화실험수거환시존재첨예적모순.
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 q-q 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.