标题： 弦有效场论中耦合常数的一圈修正 显示英文标题

标题： One loop corrections to coupling constants in String Effective Field Theory

摘要： 在最近提出的一种用于精确计算在红外区域正则化的弦幅值的框架下，我确定了对称$Z_2\times Z_2$轨形模型中辅助场的一环关联函数。 $D$场的关联函数给出了规范耦合的一环修正，这相当于弦理论的超对称Ward恒等式。 无电荷$F$场的两点函数导致模数Kähler度规的一环重整化，并最终导致Yukawa耦合的修正。 显示英文摘要

摘要： In the framework of a recently proposed method for computing exactly string amplitudes regularized in the infra-red, I determine the one-loop correlators for auxiliary fields in the symmetric $Z_2\times Z_2$ orbifold model. The $D$-field correlation function turns out to give the one-loop corrections for the gauge couplings, which amounts to a string-theory supersymmetry Ward identity. The two-point function for uncharged $F$ fields leads to the one-loop renormalization of the moduli K\"ahler metric, and eventually to the corrections for the Yukawa couplings.