近日，捷克查尔斯大学Karol Kampf团队研究了无质量带电粒子MHV振幅的软因子结构。相关论文于2025年10月21日发表在《高能物理杂志》杂志上。

研究组给出了无质量旋量和标量电动力学中MHV振幅的一个简单推导。利用排列不变振幅，研究组表明它们完全由其软光子行为决定，并且在软因素和低点振幅方面承认一个简单的因式分解形式。研究组证明了这些公式的应用递归关系。最后，研究组通过观察超对称理论、超越MHV扇区的振幅、引力和具有高自旋带电粒子的理论来考虑这些结果的可能扩展。

附：英文原文

Title: Soft factor structure of MHV amplitudes for massless charged particles

Author: Bartsch, Christoph, Kampf, Karol, Podivn, David

Issue&Volume: 2025-10-21

Abstract: We present a simple derivation of MHV amplitudes in massless spinor and scalar electrodynamics. Working with permutationally invariant amplitudes, we show that they are fully determined by their soft photon behavior and admit a simple factorized form in terms of soft factors and lower-point amplitudes. We prove these formulae using recursion relations. Finally, we consider possible extensions of these results by looking at supersymmetric theories, amplitudes beyond the MHV sector, gravity, and theories with charged particles of higher spins.

DOI: 10.1007/JHEP10(2025)185

Source: https://link.springer.com/article/10.1007/JHEP10(2025)185