重子的形状因子及重子-重子相互作用一直是核物理研究的前沿问题。相应研究不仅有助于更好地认识重子的微观结构，也有助于从更微观的层次上理解原子核及致密星体（如中子星）的性质。手征微扰理论作为 QCD 低能有效理论，原则上可以被用来模型无关地研究低能强相互作用物理。我们近期的研究表明 EOMS 协变手征微扰理论在u、d、s 三味空间，与传统的非相对论手征微扰理论相比，具有收敛速度快，并且满足所有对称性和圈图解析性质的优势。因而，我们计划利用EOMS 协变手征微扰理论在u、d、s 三味空间系统计算八重态重子电磁、赝矢和矢量形状因子到次次领头阶，并首次基于相对论拉氏量和modified Weinberg Power Counting 计算重子-重子相互作用到次领头阶，加深对这些关键物理量的认识，为格点量子色动力学从第一性原理出发模拟相关物理量，在手征延拓及格点体积延拓等方面，提供理论支持。

Baryon form factors and baryon-baryon interactions are some of the key topics in the frontiers of nuclear physics. A deeper understanding of these quantities is useful in studing not only the structure and properties of baryons but also the structure and properties of atomic(hyper) nuclei and those of dense stellar objects, such as neutron stars. Chiral perturbation theory, as the low-energy effective field theory of QCD, can in principle be applied to study low-energy strong-interaction physics in a model-independent way. Our recent studies have shown that the EOMS covariant baryon chiral perturbation theory (BChPT), compared to the non-relativistic heavy baryon chiral perturbation theory, not only converges faster but also satisfies all symmetry and analyticity constraints. We plan to systematically study the baryon-octet electromagnetic, axial-vector, and vector formfactors up to next-to-next-to-leading order with covariant baryon chiral perburtation theory in the three-flavor space. Furthermore, we are going to construct baryon-baryon interactions up to next-to-leading order using relativistic Lagrangians and the modified Weinberg Power Counting. The corresponding BChPT results not only will deepen our understanding of these key quantitiesy but also can be employed to extrapolate unphysical LQCD simulations to the physical world, in terms of light-quark masses and lattice volume, and to study the induced uncertainties.