论文标题
QCD flavour-singlet局部载体电流的非扰动重新归一化
Non-perturbative renormalization of the QCD flavour-singlet local vector current
论文作者
论文摘要
我们非扰动地计算带有3种无质量口味的晶格QCD中的local verter vertral vertry vertry vertry vertry verter $ z_v $的重新归一化常数。 Wilson Plaquette Action离散地将Gluons离散，而O（$ a $）的夸克（Quarks）改进了Wilson-dirac运营商。通过比较有限的边界条件和非零假想化学电位下的有限温度下的保守矢量电流的预期值（1点函数）来固定常数$ z_v $。具有中等计算成本的蒙特卡洛模拟使我们能够获得$ z_v $的准确度约为8 \ textperth千\，对于反向裸耦合常数$β= 6/g_0^2 $的值$ 5.3 \ leq leqβ\ leqβ\ leq leq 11.5 $。
We compute non-perturbatively the renormalization constant of the flavour-singlet local vector current $Z_V$ in lattice QCD with 3 massless flavours. Gluons are discretized by the Wilson plaquette action while quarks by the O($a$)-improved Wilson--Dirac operator. The constant $Z_V$ is fixed by comparing the expectation values (1-point functions) of the conserved and local vector currents at finite temperature in the presence of shifted boundary conditions and at non-zero imaginary chemical potential. Monte Carlo simulations with a moderate computational cost allow us to obtain $Z_V$ with an accuracy of about 8\textperthousand\, for values of the inverse bare coupling constant $β=6/g_0^2$ in the range $5.3 \leq β\leq 11.5$.
