论文标题
重物辐射的手性扰动理论和重力悬岩分子的手性有效野外理论
Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
论文作者
论文摘要
手性对称性及其自发破裂在轻体和重型强子系统中都起着重要作用。手性扰动理论（$χ$ pt）是QCD的低能量有效场理论。在这项工作中，我们将在$χ$ pt的框架内审查对重型介子和重子的属性的调查。我们还将回顾一下光伪cal的介体和繁重的哈登子的散射，通过这些散射，诸如$ d_ {s0}^\ ast（2317）$之类的许多新共鸣。 此外，在过去的几十年中，通过实验观察到了许多新的强子状态。 A large group of these states is near-threshold resonances, such as the charged charmoniumlike $Z_c$ and $Z_{cs}$ states, bottomoniumlike $Z_b$ states, hidden-charm pentaquark $P_c$ and $P_{cs}$ states and the doubly charmed $T_{cc}$ state, etc. They are very good candidates of the loosely bound molecular由一对诱人的（底部）的黑龙组成的状态，与松散结合的杜特隆非常相似。现代核力量建立在手性有效田间理论（$χ$ eft）的基础上，这是将$χ$ PT扩展到具有两个物质字段的系统。两个核之间的远距离和中长范围相互作用分别来自单杆和双基交换，这些交换受到手性对称性及其自发断裂的良好约束。低距离相互作用可以用低能常数描述。这样的框架非常适合核子核子散射和核。在这项工作中，我们将对$χ$ eft的框架内的重型腺力分子状态的进度进行广泛的审查。我们将强调，相同的手性动力学不仅控制着核并形成杜特龙，而且还决定了由两个重型辐射组成的浅层结合状态或共振。
Chiral symmetry and its spontaneous breaking play an important role both in the light hadron and heavy hadron systems. The chiral perturbation theory ($χ$PT) is the low energy effective field theory of the QCD. In this work, we shall review the investigations on the chiral corrections to the properties of the heavy mesons and baryons within the framework of $χ$PT. We will also review the scatterings of the light pseudoscalar mesons and heavy hadrons, through which many new resonances such as the $D_{s0}^\ast(2317)$ could be understood. Moreover, many new hadron states were observed experimentally in the past decades. A large group of these states is near-threshold resonances, such as the charged charmoniumlike $Z_c$ and $Z_{cs}$ states, bottomoniumlike $Z_b$ states, hidden-charm pentaquark $P_c$ and $P_{cs}$ states and the doubly charmed $T_{cc}$ state, etc. They are very good candidates of the loosely bound molecular states composed of a pair of charmed (bottom) hadrons, which are very similar to the loosely bound deuteron. The modern nuclear force was built upon the chiral effective field theory ($χ$EFT), which is the extension of the $χ$PT to the systems with two matter fields. The long-range and medium-long-range interactions between two nucleons arise from the single- and double-pion exchange respectively, which are well constrained by the chiral symmetry and its spontaneous breaking. The short-distance interactions can be described by the low energy constants. Such a framework works very well for the nucleon-nucleon scattering and nuclei. In this work, we will perform an extensive review of the progress on the heavy hadronic molecular states within the framework of $χ$EFT. We shall emphasize that the same chiral dynamics not only govern the nuclei and forms the deuteron, but also dictates the shallow bound states or resonances composed of two heavy hadrons.
