标题： 格点上的重正化群项 显示英文标题

标题： Renormalons on the Lattice

摘要： 我们给出了B介子结合能 \$ \text\{$\labar$\} \$ 和赝标B介子内部重夸克动能 \$ \text\{$\lambda_1/2 m_Q$\} \$ 的首个格点计算结果。 为了消除算符矩阵元中由于紫外重整子引起的歧义，这项计算需要对拉格朗日算符 \$ \text\{$\energy$\} \$ 和动能算符 \$ \text\{$\kkinetic$\} \$ 中存在的幂发散进行非微扰消减。 相关算符的非微扰重整化通过在朗道规范下对夸克矩阵元施加适当的重整化条件来实现。 显示英文摘要

摘要： We present the first lattice calculation of the B-meson binding energy $\labar$ and of the kinetic energy $\lambda_1/2 m_Q$ of the heavy-quark inside the pseudoscalar B-meson. In order to cancel the ambiguities due to the ultraviolet renormalons present in the operator matrix elements, this calculation has required the non-perturbative subtraction of the power divergences present in the Lagrangian operator $\energy$ and in the kinetic energy operator $\kkinetic$. The non-perturbative renormalization of the relevant operators has been implemented by imposing suitable renormalization conditions on quark matrix elements in the Landau gauge.