Flat space fermionic wave-function coefficients
Abstract
A bstract In this work we analyze the analytic structure of tree-level flat-space wavefunction coefficients (WFCs), with particular attention to fermionic operators, and derive cutting rules for internal-fermion lines. Building on these results, we set up an iterative procedure that, starting from the flat-space S-matrix, reconstructs the 3- and 4-point WFCs with the correct partial- and total-energy poles and satisfying the requisite cutting rules. Consequently, the “four-particle test” for flat-space WFCs imposes no additional constraints beyond the consistency of the flat-space S-matrix.
Fields of Study & Subjects
Particle physics theoretical and experimental studies
Quantum and Classical Electrodynamics
Physics of Superconductivity and Magnetism
Publication details
- Journal / source
- Journal of High Energy Physics
- Volume
- 2026
- Issue
- 9
- Publication date
- 17 September 2026
- Language
- EN