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.

⚛️ phenomenology

Stochastic analysis of finite-temperature effects on cosmological parameters by artificial neural networks

This paper employs artificial neural networks and stochastic optimization to analyze finite-temperature quantum gravity effects on cosmological parameters, demonstrating that incorporating new temperature-dependent density terms improves the fit to Planck data and suggests a non-negligible role for thermal quantum corrections in cosmological evolution.

Armin Hatefi, Ehsan Hatefi, I. Y. Park2026-02-18
⚛️ general relativity

Environmentally-induced chaos: Extreme-mass-ratio systems of rotating black holes in astrophysical environments

This paper demonstrates that astrophysical environments surrounding rotating black holes break spacetime symmetries, inducing chaotic orbital dynamics and extending the lifespan of resonant islands in extreme-mass-ratio inspirals, which creates distinct imprints on gravitational-wave signals that challenge current vacuum-based modeling and parameter inference.

Kyriakos Destounis, Pedro G. S. Fernandes2026-02-18
⚛️ high-energy theory

Beyond Wigner: Non-Invertible Symmetries Preserve Probabilities

This paper resolves the apparent conflict between Wigner's theorem and non-invertible symmetries by demonstrating that unitary fusion category symmetries preserve probabilities not through unitary operators on a fixed Hilbert space, but by acting as trace-preserving quantum channels via isometries between distinct Hilbert spaces constructed from twisted sectors.

Thomas Bartsch, Yuhan Gai, Sakura Schafer-Nameki2026-02-18
⚛️ high-energy theory

A Surface Integrand for the Inverse KLT Kernel

This paper proposes a loop-level generalization of the inverse KLT kernel as a planar integrand defined by a Berends-Giele-like recursion, demonstrating its structural equivalence to cubic scalar theory integrands and its ability to unify cubic scalar and non-linear sigma model scattering through kinematic α′\alpha'-shifts on the kinematic surface.

Christoph Bartsch, Karol Kampf, Jiří Novotný, Jaroslav Trnka2026-02-18
⚛️ high-energy theory

Learning the S-matrix from data: Rediscovering gravity from gauge theory via symbolic regression

This paper demonstrates that symbolic regression applied to numerical on-shell data can autonomously rediscover fundamental analytic structures in scattering amplitudes, including KLT, Kleiss-Kuijf, and BCJ relations, thereby establishing a data-driven strategy for uncovering hidden theoretical connections like the gravity-gauge duality without relying on prior group-theoretic knowledge.

Nathan Moynihan2026-02-18