Derivation of the Cross-Free Family representation for the box diagram

2023/11/24 by Zeno Capatti, Capatti, Zeno · 3 citations
Mathematics · Physics and Astronomy · #Advanced Chemical Physics Studies #Algebraic structures and combinatorial models #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Quantum chaos and dynamical systems

paper · pdf · doi:10.48550/arxiv.2311.14374

openalex publication_date 2023/11/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

I work out in full detail the derivation of the Cross-Free Family (CFF) representation for the box diagram, and highlight the differences with its Time Ordered Perturbation Theory (TOPT) representation. I briefly discuss implications for the threshold singularity structure of the diagram.

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