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.

⚛️ general relativity

When inflationary perturbations refuse to classicalise: the role of non-Gaussianity in Wigner negativity

By computing the Wigner function of inflationary curvature perturbations using the EFT of inflation, this paper demonstrates that primordial non-Gaussianities generate persistent quantum interference fringes and growing Wigner negativity on super-Hubble scales, proving that squeezing alone is insufficient to ensure classicality and suggesting that genuinely quantum signatures of the universe's origins may be detectable.

Aurora Ireland, Vincent Vennin2026-02-24
⚛️ nuclear theory

Analytic continuation of Green's functions with a neural network

This paper presents a convolutional neural network trained on improved Gaussian data to reconstruct spectral densities from imaginary-time Green's functions, demonstrating that while it outperforms the standard Maximum Entropy method on data similar to its training set, the latter remains superior for identifying physical features in complex models like the 1d Hubbard and 2d SSH systems.

Fakher Assaad, Johanna Erdmenger, Anika Götz, René Meyer, Martin Rackl, Yanick Thurn2026-02-24
⚛️ lattice

Dark Glueball Direct Detection

This paper proposes a viable glueball dark matter candidate arising from a confined Yang-Mills sector coupled to the Standard Model via vector-like fermion portals, developing a non-perturbative effective field theory framework that predicts a steeply scaling spin-independent scattering cross-section (σSIΛD2.15mψ8\sigma_{\rm SI}\propto \Lambda_D^{2.15} m_\psi^{-8}) within the sensitivity reach of current and next-generation xenon direct-detection experiments.

Ji-Wei Li, Roman Pasechnik, Wei Wang, Zhi-Wei Wang2026-02-24
⚛️ general relativity

Exploring the Universe Expansion History with f(R,T) Gravity: Constraints on Cosmological Parameters

This paper investigates two specific f(R,T)=R+αTnf(R,T) = R + \alpha T^n gravity models with n=1n=1 and n1n \neq 1, demonstrating through observational data analysis and parameter constraints that they successfully reproduce the Universe's transition from deceleration to late-time acceleration while remaining consistent with the standard Λ\LambdaCDM model and satisfying key energy conditions.

Mustapha Lamaaoune2026-02-24