论文标题
来自手性有效的diquarks的巨大重型baryon的强烈衰减
Strong decays of singly heavy baryons from a chiral effective theory of diquarks
论文作者
论文摘要
标量和矢量diquarks的手性有效理论是制定的，该理论基于$ su（3）_r \ times su（3）_l $手性对称性，并包括标量与矢量diquark之间与一个或两个介子之间的相互作用。我们发现，带有两个介子的diquark互动术语打破了$ u（1）_a $和风味$ su（3）$ symmetries。为了确定互动Lagrangians的耦合常数，我们调查了单杆重型Baryons $ QQQ $（$ Q = C，B $和$ Q = U，D，S $）的一杆排放衰减，在该腐蚀中，Baryons被视为diquark-eavy-eavy-eavy-eavy-eavy-quark Quark两体系统。使用此模型，我们介绍了单一重型重子的未观察到的衰减宽度的预测。我们还研究了手性对称性的部分恢复，质量变化和较强的重型重子的衰减宽度。
A chiral effective theory of scalar and vector diquarks is formulated, which is based on $SU(3)_R\times SU(3)_L$ chiral symmetry and includes interactions between scalar and vector diquarks with one or two mesons. We find that the diquark interaction term with two mesons breaks the $U(1)_A$ and flavor $SU(3)$ symmetries. To determine the coupling constants of the interaction Lagrangians, we investigate one-pion emission decays of singly heavy baryons $Qqq$ ($Q=c, b$ and $q=u,d,s$), where baryons are regarded as diquark--heavy-quark two-body systems. Using this model, we present predictions of the unobserved decay widths of singly heavy baryons. We also study the change of masses and strong decay widths of singly heavy baryons under partial restoration of chiral symmetry.
