Fermionic Hidden Zeros and New Factorizations

by 勇 张 (宁波大学)

Wednesday 23 Sept 2026, 15:00 → 17:00 Asia/Shanghai

摘要：We uncover a general class of hidden zeros in tree-level amplitudes with massless fermions and show that they are naturally embedded in a broader new-factorization structure. For arbitrary even numbers and arbitrary arrangements of massless real adjoint fermions and gluons, color-ordered gauge-theory amplitudes vanish on rectangular kinematic loci supplemented by simple species-dependent bridge conditions. In particular, the fermion–fermion bridge is governed by the vector current χ_i γ^μ χ_j . Using a worldsheet description, we show that the underlying local structure closes on the fusion channels ff → g, fg/gf → f, gg → g, with no new primitive fermionic structures appearing at higher multiplicity. When the bridge conditions are relaxed while the rectangular kinematics is kept, the amplitudes instead obey new factorization relations built from local physical three-point fusion and a universal rectangular completion.

个人简介：张勇，宁波大学基础物理与量子科技研究院、物理科学与技术学院教授。2015年本科毕业于四川大学，2020年博士毕业于中国科学院理论物理研究所，曾先后在瑞典乌普萨拉大学和加拿大圆周理论物理研究所从事博士后研究，2025年加入宁波大学。主要从事量子场论与散射振幅研究，研究兴趣包括规范理论、引力，以及散射振幅中的隐藏零点、因子化与其他结构性问题。