近日，莫斯科国立罗蒙诺索夫大学Dmitry Ponomarev团队研究了高自旋背景下点粒子动力学的不一致性：大质量粒子。相关论文于2025年8月25日发表在《高能物理杂志》上。

在此之前，研究组已经证明了无质量标量点粒子不能在手性高自旋理论的经典背景下传播。这一结论是通过对发生在相互作用中的二阶光锥一致性条件的分析得出的。

研究组将这一结果推广到大质量粒子的情况，表明大质量粒子在手性高自旋背景下也不能传播。为了做到这一点，他们采用了一种不同的、更直接的方法，它不依赖于对无质量粒子进行特殊的简化。具体而言，研究组在给定阶数上完全广义地求解光锥相容性条件，并证明所发现的所有哈密顿量必然具有非定域性。他们着重强调了最终推导过程与应用于世界线散射观测量之壳上方法之间的内在联系。

附：英文原文

Title: Inconsistency of point-particle dynamics on higher-spin backgrounds: massive particles

Author: Ivanovskiy, Vyacheslav, Ponomarev, Dmitry

Issue&Volume: 2025-08-25

Abstract: Previously, we showed that massless scalar point particles cannot propagate on classical backgrounds of chiral higher-spin theories. This conclusion was derived from the analysis of the light-cone consistency conditions occurring at the second order in interactions. In the present paper, we extend this result to the case of massive particles, showing that these cannot propagate on chiral higher-spin backgrounds either. In order to do that, we use a different and more direct approach, which does not rely on special simplifications occurring for massless particles. Namely, we solve the light-cone consistency conditions at the given order in complete generality and then show that all the Hamiltonians found are inevitably non-local. We emphasise connections between the resulting procedure and the on-shell methods applied to worldline scattering observables.

DOI: 10.1007/JHEP08(2025)202

Source: https://link.springer.com/article/10.1007/JHEP08(2025)202