arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.5935hep-ph
收藏

QCD中自旋3/2到自旋1/2的重子和赝标介子跃迁

Spin--3/2 to spin--1/2 heavy baryons and pseudoscalar mesons transitions in QCD

T. M. Aliev, K. Azizi, M. Savci

摘要:

在轻锥QCD求和规则框架下计算了自旋为-3/2的轻赝标介子和自旋为-1/2的重子的强耦合常数。结果表明,自旋为3/2的六重态到自旋为1/2的六重态重子和自旋为3/2的六重态到自旋为1/2的反三重态重子之间的每一类跃迁都可用一个不变函数描述.我们还估计了运动学允许的过渡的宽度。我们的结果与现有的实验数据,以及其他非微扰方法的预测衰减宽度是在很好的协议。

英文摘要:

The strong coupling constants of light pseudoscalar mesons with spin--3/2 and spin--1/2 heavy baryons are calculated in the framework of light cone QCD sum rules. It is shown that each class of transitions among members of the sextet spin--3/2 to sextet spin--1/2 baryons and that of the sextet spin--3/2 to spin--1/2 anti--triplet baryons is described by only one invariant function. We also estimate the widths of kinematically allowed transitions. Our results on decay widths are in good agreement with the existing experimental data, as well as predictions of other nonperturbative approaches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑