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

Primordial black holes through preheating instabilities in α\alpha-attractor models

This paper investigates primordial black hole formation during the preheating phase of α\alpha-attractor inflation, demonstrating that while the Press-Schechter formalism overestimates abundance and is ruled out by observational constraints, the Khlopov-Polnarev formalism—which accounts for nonspherical collapse effects—yields viable predictions consistent with current data.

Daniel del-Corral, Paolo Gondolo, K. Sravan Kumar, João Marto2026-07-16
⚛️ high-energy theory

Causality Constraints on Black Hole Thermodynamics in Nonlinear Electrodynamics

This paper demonstrates that imposing causality constraints (the absence of superluminal propagation) in nonlinear electrodynamics leads to specific monotonicity properties for the mass-to-charge ratio and entropy density of extremal black holes, thereby extending previous findings on entropy corrections to all orders in the theory.

Yoshihiko Abe, Maxime Médevielle, Toshifumi Noumi, Kaho Yoshimura2026-07-16
⚛️ general relativity

A Thermodynamic Positivity Bound on Higher-Derivative 3-Form Couplings in de Sitter, and its Inflationary Consequences

This paper establishes a thermodynamic positivity bound on higher-derivative 3-form couplings in de Sitter space, demonstrating that the exact Nariai state saturates the classical black hole mass limit and revealing that such thermodynamic constraints are more stringent than inflationary dynamics alone, thereby ruling out small-field models while supporting large-field Higgs-like inflation consistent with Planck data.

Nutthaphat Lunrasri, Chakrit Pongkitivanichkul2026-07-16
⚛️ general relativity

Non-linear Dynamics and Primordial Black Hole Formation During Kination

Using numerical relativity to evolve Einstein equations, this study demonstrates that while scalar perturbations during the kination epoch follow perturbative predictions in the sub-horizon limit, they exhibit rich non-linear dynamics in the super-horizon regime that may lead to primordial black hole formation and potentially reheat the universe.

Cheng Cheng, Panagiotis Giannadakis, Lucien Heurtier, Eugene A. Lim2026-07-16
⚛️ phenomenology

Quantum Computing Hadron Fragmentation Functions in Light-Front Chromodynamics

This paper presents a novel quantum simulation framework using Light-Front Quantization to calculate hadron fragmentation functions from first principles, demonstrating its feasibility through a classical proof-of-concept computation of charm-to-charmonium fragmentation that aligns with established perturbative results.

Juan José Gálvez-Viruet, Felipe J. Llanes-Estrada, Nicolás Martínez de Arenaza, María Gómez-Rocha, Timothy J. Hobbs2026-07-16
⚛️ general relativity

Robust Preference for Dark Sector Interactions

This paper demonstrates that recent DESI baryon acoustic oscillation data, which suggest deviations from Λ\LambdaCDM cosmology, are robustly explained by interactions between dark matter and dark energy (IDE) rather than dynamical dark energy, offering a physically motivated alternative that fits observational data as well as or better than standard dynamical models.

Tian-Nuo Li, William Giarè, Guo-Hong Du, Yun-He Li, Eleonora Di Valentino, Jing-Fei Zhang, Xin Zhang2026-07-16
⚛️ high-energy theory

Notes on (-2)-form symmetries

This paper investigates (2)(-2)-form symmetries in dd-dimensional quantum field theories by realizing them as (1)(-1)-form symmetries in their (d+1)(d+1)-dimensional Symmetry Topological Field Theory, demonstrating how these symmetries modify the SymTFT action to relate theories with differing anomaly or associator data through various constructions including toy models, gauge theories, and holographic duals.

Pinak Banerjee, Alonso Perez-Lona, Daniel Robbins, Subham Roy, Eric Sharpe, Xingyang Yu2026-07-16