论文标题
手性模型中类似roper的单一重型重牛奶的腐烂
Decays of Roper-like singly heavy baryons in a chiral model
论文作者
论文摘要
我们提出了一种描述类似roper的$λ_c（2765）$和$ξ_c（2970）$的手性模型，以及重夸克spin-doublet $ \ \ {σ_c（2455），σ_c（2455），σ_c（2520）\} $ and $ \ c（$ \ cont）重型重子内的diquark的表示。基于我们的手性模型以及重夸克自旋对称性，我们得出了由重型重子的轴向电荷所满足的关系，该轴向控制了他们的一只斜向大小（KAON）衰变的大小。此外，还表明，类似Roper的$λ_C（2765）$和$ξ_c（2970）$的较大衰减宽度无法通过常规的非权利性夸克模型来实现，这是通过轴向电荷的合理值来解释的。此外，我们将手性模型应用于底部的重子，并预测未发现的类似Roper的$ξ_b$的衰减宽度。我们预计我们目前的研究会导致从手性对称的角度阐明激发重气子的动力学特性。
We present a chiral model describing decays of the Roper-like $Λ_c(2765)$ and $Ξ_c(2970)$ as well as those of the heavy quark spin-doublet $\{Σ_c(2455),Σ_c(2520)\}$ and $\{Ξ_c',Ξ_c(2645)\}$, by focusing on chiral representations of diquarks inside the heavy baryons. Based on our chiral model together with the heavy quark spin symmetry, we derive a relation satisfied by axial charges of the heavy baryons that controls magnitude of their one pion (kaon) decays. Besides, it is shown that the large decay widths of the Roper-like $Λ_c(2765)$ and $Ξ_c(2970)$, which cannot be implemented by conventional non-relativistic quark models, are explained by reasonable values of the axial charges. In addition, we apply the chiral model to bottom baryons and predict decay widths of the undiscovered Roper-like $Ξ_b$. We expect that our present investigation leads to elucidation of dynamical properties of the excited heavy baryons from the viewpoint of chiral symmetry.
