Quark mass dependence of hadronic observables (A05)

虽然现在许多晶格QCD计算是在上下夸克质量接近其物理值的情况下进行的，但由于几个原因，对强子可观测物的夸克质量依赖的研究仍然引起了人们的高度兴趣。首先，仍然有许多晶格QCD计算是在轻夸克质量大于其物理值的情况下进行的。对于这些，手性外推是必须的。其次，某种味道的轻夸克质量的依赖性可以用来获得对各种强子内部结构的重要见解。第三，重夸克质量依赖性可以用来检验重夸克风味对称（HQFS）在多大程度上可以用来预测由一对重强子组成的强子分子。我们想研究介子-核子散射过程中的Wick收缩和CHPT中核子的形态因子，耦合通道共振的夸克质量依赖性，HQFS对强子分子的作用以及轻核结合能的θ-依赖性。

Although nowadays many lattice QCD calculations are performed with up and down quark masses close to their physical values, the study of the quark mass dependence of hadronic observables is still of high interest for several reasons. First, there are still many lattice QCD calculations being done with light quark masses larger than their physical values. For these a chiral extrapolation is mandatory. Second, the dependence of the light quark mass of a certain flavor can be used to gain important insights into the internal structure of various hadrons. Third, the heavy quark mass dependence can be used to test to what extent heavy quark flavor symmetry (HQFS) can be used to make predictions of hadronic molecules formed by a pair of heavy hadrons. We want to study Wick contractions for meson-nucleon scattering processes and nucleon form factors in CHPT, the quark mass dependence of coupled-channel resonances, the role of HQFS for hadronic molecules and the θ-dependence of the binding energies of light nuclei.