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

Feynman Integral Reduction using Syzygy-Constrained Symbolic Reduction Rules

This paper introduces a new algorithm for the efficient integration-by-parts (IBP) reduction of complex Feynman integrals with high powers of numerators or propagators, utilizing syzygy-constrained symbolic rules and small linear systems to achieve significantly faster computation speeds in demanding applications like multi-loop scattering amplitudes and spinning black hole binary systems.

Sid Smith, Mao Zeng2026-02-23
⚛️ general relativity

Bumblebee Gravity -- Lessons from Perturbation Theory

This paper demonstrates that non-minimally coupled bumblebee models on an FLRW background are generally pathological due to the presence of ghost modes and non-propagating scalar perturbations, unless specific degeneracy conditions are met to reduce them to a subset of generalized Proca theory, while also imposing a stringent constraint on the bumblebee field derived from the speed of tensor modes.

Nils A. Nilsson2026-02-23
⚛️ general relativity

Ringdown in Vaidya spacetimes: time-dependent frequencies, Penrose limit and time-domain analyses

This paper investigates the characterization of ringdown waves in dynamical Vaidya spacetimes by extending the correspondence between quasinormal frequencies and unstable null geodesics (via the Penrose limit) from static black holes to time-dependent scenarios, validating the approach through comparisons with numerically calculated waveforms.

Chul-Moon Yoo, Masashi Kimura, Akihiro Ishibashi, Rikuto Ohashi2026-02-23
⚛️ general relativity

Gravitational Wave Scattering in Spinless WQFT

This paper establishes a computational framework for spinless gravitational wave scattering in worldline quantum field theory, proving that the SS-matrix exponentiates to match black hole perturbation theory phase shifts up to O(G3)O(G^3) while providing efficient diagram generation and integral calculation techniques for future high-precision analyses.

Yilber Fabian Bautista, Mathias Driesse, Kays Haddad, Gustav Uhre Jakobsen2026-02-23