Author

S. Zoia

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Preprint Oct 2026

Two-loop integrals for $t\bar{t}\gamma$ production at hadron colliders in the leading-colour approximation

We complete the calculation of the two-loop Feynman integrals required for the next-to-next-to-leading order QCD corrections to on-shell top--antitop production in association with a photon at hadron colliders, in the leading-colour approximation. The same integrals also enter the subleading-colour corrections to top--...

Souvik Bera, C. Brancaccio, D. Canko et al. · 0 citations

Preprint Sep 2026

The Stieltjes Bootstrap for Feynman Integrals

We prove that scalar Feynman integrals are Stieltjes functions in each kinematic variable $-p_i\cdot p_j$, as well as in the particle masses, for arbitrary loop order, arbitrary numbers of external legs, and arbitrary internal masses, whenever a certain exponent condition is satisfied. The proof rests on a canonical de...

Hadrien Brochet, Maximilian Haensch, Johannes M. Henn et al. · 0 citations