Weak Decays of Doubly Heavy Baryons: Bcc->BD()
Weak Decays of Doubly Heavy Baryons: Bcc->BD()
复制标题
双重重子的弱衰变：Bcc->BD()
DOI：
10.1088/1674-1137/abe0bc
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发表时间：
2021
影响因子：
3.6
通讯作者：
Ya-Ru Wang
中科院分区：
文献类型：
--
作者：
Run-Hui Li;Juan-Juan Hou;Bei He;Ya-Ru Wang
的发现激发了人们对研究二重重子的新兴趣。本文计算了一个双粲重子到一个轻重子和一个粲介子（无论是赝标还是矢量介子）的弱衰变。在我们以前的工作之后，我们在因子分解假设下计算短距离贡献，而长距离贡献被建模为用单粒子交换模型计算的终态相互作用。我们发现，由于有更多极化态的贡献，衰变的分支比明显增大。在我们研究的衰变中，以下衰变具有最大的分支分数：估计与fs;和与fs;和与fs。通过比较纯色公度通道和纯蝴蝶结公度通道的衰减宽度，我们发现蝴蝶结机制在魅力衰减中起着重要的作用。
The discovery ofhas inspired new interest in studying doubly heavy baryons. In this study, the weak decays of a doubly charmed baryonto a light baryonand a charm meson(either a pseudoscalar or a vector one) are calculated. Following our previous work, we calculate the short distance contributions under the factorization hypothesis, whereas the long distance contributions are modeled as the final state interactions which are calculated with the one particle exchange model. We find that thedecays' branching ratios are obviously larger, as they receive contributions of more polarization states. Among the decays that we investigate, the following have the largest branching fractions:estimated withfs;andwithfs; and,andwithfs. By comparing the decay widths of pure color commensurate channels with those of pure bow-tie ones, we find that the bow-tie mechanism plays an important role in charm decays.