3 papers
hep-th2026
Resurgence of high-energy string amplitudes
Xavier Kervyn, Stephan Stieberger
We analyze the fixed-angle high-energy () structure of -point tree-level string amplitudes from complementary perspectives: locally via saddle-point expansions,…
hep-th2025
High Energy String Theory and the Celestial Sphere
Xavier Kervyn, Stephan Stieberger
We elaborate on a string world-sheet connection to flat space-time holography. More specifically, in the high energy (zero tension) limit of tree-level string scattering in flat ba…
hep-th2025
Thermodynamics of integrable N=2 theories, squared
Xavier Kervyn, Davide Polvara, Alessandro Sfondrini
In arXiv:2306.17553 a new supersymmetric integrable QFT was constructed from the relativistic limit of the worlsdheet theory of AdS ST superstrings with m…