标题： 正则化轻锥电流的发散结构 显示英文标题

标题： Regularizing the Divergent Structure of the Light-Front Currents

摘要： 在3+1维费米子环计算中出现的发散通常通过以协变方式对顶点进行平滑来调节。 进行平行光锥计算，我们证实了顶点平滑技术与保罗-维尔特定则之间的相似性。 在电磁介子流的光锥计算中，我们发现即使将平滑顶点取到点顶点的极限，点顶点情况下出现的持续端点奇异性也会被消除。 重申电流守恒，我们证明了在正则化束缚态顶点下，电流所有分量中的价贡献和非价贡献都是有限的。 然而，我们强调，每个贡献（价或非价）都依赖于参考系，尽管总和始终与参考系无关。 包括瞬时贡献和零模贡献在内的每个贡献的数值分类在$\pi$、$K$和$D$-介子形式因子中给出。 显示英文摘要

摘要： The divergences appearing in the 3+1 dimensional fermion-loop calculations are often regulated by smearing the vertices in a covariant manner. Performing a parallel light-front calculation, we corroborate the similarity between the vertex-smearing-technique and the Pauli-Villars regularization. In the light-front calculation of the electromagnetic meson current, we find that the persistent end-point singularity that appears in the case of point vertices is removed even if the smeared-vertex is taken to the limit of the point-vertex. Recapitulating the current conservation, we substantiate the finiteness of both valence and non-valence contributions in all components of the current with the regularized bound-state vertex. However, we stress that each contribution, valence or non-valence, depends on the reference-frame even though the sum is always frame-independent. The numerical taxonomy of each contribution including the instantaneous contribution and the zero-mode contribution is presented in the $\pi$, $K$, and $D$-meson form factors.