Tootfinder

Computing the soft anomalous dimension with massless particles using the method of regions
Einan Gardi, Zehao Zhu
https://arxiv.org/abs/2509.18017 https://…

Computing the soft anomalous dimension with massless particles using the method of regions
It is well known that soft singularities of massless amplitudes are significantly simpler than those of massive ones. However, the computation of the soft anomalous dimension (AD) using Wilson-lines correctors is only straightforward in the massive case, thanks to the multiplicative renormalizability of correlators of non-lightlike Wilson lines. Instead, correlators involving lightlike lines, develop higher-order poles in dimensional regularization due to collinear singularities, on top of thei…