三介子奇特强子态的系统研究：从DK/Ds0*(2317)到DDK/R(4140)

近20年来，对奇特强子态的研究已经成为世界上各大高能物理实验装置的重要科学目标，吸引了理论物理学家的极大兴趣，推动了人们对低能区非微扰强相互作用的认识。奇特强子态大体可以分为紧束缚的多夸克态和弱束缚的分子态。我们建议通过系统研究多强子分子态系统的束缚能，产生、衰变以及在有限离散空间的性质，来检验分子态图像，为实验和格点QCD模拟寻找多强子分子态提供参考，加深对低能区非微扰强相互作用的认识。具体来说：我们计划基于DK相互作用可以动力学产生Ds0*(2317)的事实，发展三体计算方法，计算DDK系统的束缚能，研究其产生、衰变性质，及其在有限离散空间的行为。并将相应研究扩展至DDDK/DDKK四体系统以及其它的三强子、四强子系统。

In the past twenty years, studies of exotic hadrons have become one of the most important scientific topics in every large international high energy physics facilities and attracted lots of theoretical interests and have advanced much our understanding of the non perturbative low energy strong interactions. Exotic hadrons can be roughly classified into two groups: compact multiquark states and loosely bound molecular states. In this project, we propose to better understand the molecular picture by a systematic study of multi hadron systems, via their binding energy, production and decay mechanisms, and their behavior in finite volume. Such a study can help experimental searches of multi hadron molecules and deepen our understanding of the non-perturbative strong interactions. More specifically, based on the fact that the DK interaction is attractive enough to form the Ds0*(2317) molecular state, we will develop three-body methods (both in coordinate space and momentum space), calculate the binding energy of the DDK system, study its production and decay mechanisms, and develop methods to study the DDK interaction in finite volume. The methods developed in this project can be applied to DDDK/DDKK four body systems and other three-body/four-body hadronic systems.