Large-loop log-Gamma distribution conjecture for phi-four periods

For each loop order LL, consider the period Feynman integrals of ϕ4\phi^4 theory and sample them with probability inversely proportional to the symmetry factor of their associated Feynman graph. A probability distribution is said to weakly converge if its integrals against bounded continuous test functions converge. Large-loop log-Gamma distribution conjecture. As LL\rightarrow\infty, the distribution of these period Feynman integrals weakly converges to a log\log-Γ\Gamma distribution. The observed convergence is based on finite-loop numerical data, particularly at 17 loops; the limiting parameters are fitted at each loop order, and their asymptotic laws remain to be determined.

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Primary source

Michael Borinsky and Andrea Favorito, “Feynman integrals at large loop order and the -Γ distribution”, arXiv:2503.07803 (2025).

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