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.

⚛️ lattice

Chemical potential differentials in the QCD phase diagram from heavy-ion isobar collisions

This paper utilizes Bayesian thermal analysis of hadron yields from STAR Ru+Ru and Zr+Zr isobar collisions to precisely extract chemical potential differentials in the QCD phase diagram, thereby validating these collisions as a high-precision probe for four-dimensional QCD thermodynamics against lattice-QCD and Chiral Mean Field model predictions.

Joaquin Grefa, Chun Yue Tsang, Rajesh Kumar, Veronica Dexheimer, Claudia Ratti, Zhangbu Xu2026-01-30
⚛️ general relativity

Gravitational amplitudes in the Regge limit: waveforms, shock waves and unitarity cuts

This paper develops a systematic Regge-theory framework for high-energy gravitational scattering of massive particles with multiple graviton emissions, unifying quantum and classical descriptions through exponential S-matrix and shock-wave formalisms to compute specific amplitudes and waveforms for ultra-relativistic Kerr black holes.

Francesco Alessio, Vittorio Del Duca, Riccardo Gonzo, Emanuele Rosi2026-01-30
⚛️ phenomenology

Neural S-matrix bootstrap II: solvable 4d amplitudes with particle production

This paper employs a neural-network-based solution to nonlinear integral equations derived from unitarity and crossing symmetry to construct a solvable family of nonperturbative 4D scattering amplitudes that exhibit rich features like particle production and Regge behavior, while demonstrating that multi-particle data can be dynamically tuned to suppress low-spin production through a phenomenon termed "Aks screening."

Mehmet Asim Gumus, Damien Leflot, Piotr Tourkine, Alexander Zhiboedov2026-01-30