SU(3) analysis of weak decays of doubly-heavy tetraquarks b(c)over-barq(q)over-bar
SU(3) analysis of weak decays of doubly-heavy tetraquarks b(c)over-barq(q)over-bar
复制标题
SU(3)双重四夸克弱衰变b(c)over-barq(q)over-bar
DOI：
10.1140/epjc/s10052-019-6729-0
复制
发表时间：
2019
影响因子：
4.4
通讯作者：
Xing Ye
中科院分区：
文献类型：
--
作者：
Li Gang;Wang Xiao-Feng;Xing Ye
我们研究具有两个重夸克的奇异四夸克态的弱衰变。根据轻夸克的 SU(3) 对称性，这些四夸克可以分为八重态加单重态：我们将专注于八重四夸克，并研究它们的弱衰变，包括半轻子和非轻子。强子级有效哈密顿量是根据SU(3)群的不可约表示构造的。扩展哈密顿量，我们获得了用一些不可约量参数化的衰减幅度。根据这些振幅，得出衰减宽度的关系，可以在将来进行测试。我们还提供了一个黄金通道列表，可用于在各种碰撞器中查找这些状态。
We study the weak decays of exotic tetraquark stateswith two heavy quarks. Under the SU(3) symmetry for light quarks, these tetraquarks can be classified into an octet plus a singlet:. We will concentrate on the octet tetraquarks with, and study their weak decays, both semileptonic and nonleptonic. Hadron-level effective Hamiltonian is constructed according to the irreducible representations of the SU(3) group. Expanding the Hamiltonian, we obtain the decay amplitudes parameterized in terms of a few irreducible quantities. Based on these amplitudes, relations for decay widths are derived, which can be tested in future. We also give a list of golden channels that can be used to look for these states at various colliders.