Hep-Th, or high-energy theoretical physics, explores the fundamental building blocks of our universe and the forces that govern them. Researchers in this field use complex mathematics to understand everything from subatomic particles to the behavior of black holes, often pushing the boundaries of what we know about space and time.

At Gist.Science, we monitor the arXiv repository to ensure you stay ahead of the curve in this rapidly evolving discipline. For every new preprint uploaded to arXiv under this category, our team generates both accessible plain-language overviews and detailed technical summaries, making cutting-edge research understandable regardless of your background.

Below are the latest papers in high-energy theoretical physics, curated to help you navigate the most significant recent discoveries.

Gauging Non-Invertible Symmetries: Topological Interfaces and Generalized Orbifold Groupoid in 2d QFT

This paper establishes a systematic framework for gauging non-invertible symmetries in two-dimensional quantum field theories by formulating the process through topological interfaces, thereby extending standard gauging properties to general fusion categories, deriving key mathematical theorems from physical axioms, and identifying new self-dualities and a generalized orbifold groupoid structure.

Oleksandr Diatlyk, Conghuan Luo, Yifan Wang, Quinten Weller2026-03-27🔢 math-ph

(2+2)D Collective Model based on a relativistic Boltzmann equation in the Isotropization Time Approximation: CoMBolt-ITA

This paper presents CoMBolt-ITA, a new (2+2)D collective model based on the relativistic Boltzmann equation in the isotropization time approximation that successfully couples pre-equilibrium dynamics with hydrodynamics to simulate quark-gluon plasma evolution, demonstrating strong consistency with standard hydrodynamic and hybrid models for small shear viscosity while revealing significant discrepancies and nontrivial thermalization effects for larger viscosity values.

S. F. Taghavi, S. M. A. Tabatabaee Mehr, F. Taghinavaz2026-03-27⚛️ nucl-th

The geometric bookkeeping guide to Feynman integral reduction and ε\varepsilon-factorised differential equations

This paper presents a systematic algorithm for obtaining ε\varepsilon-factorised differential equations for any Feynman integral by trivialising ε\varepsilon-dependence in integration-by-parts identities, optimising the Laporta algorithm to yield a specific master integral basis, and proving the transformability of the resulting equations into the desired form, all while significantly improving computational efficiency.

Iris Bree, Federico Gasparotto, Antonela Matijašic, Pouria Mazloumi, Dmytro Melnichenko, Sebastian Pögel, Toni Teschke, Xing Wang, Stefan Weinzierl, Konglong Wu, Xiaofeng Xu2026-03-27⚛️ hep-th