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.

Kontorovich-Lebedev-Fourier Space for de Sitter Correlators

This paper introduces a novel Kontorovich-Lebedev-Fourier frequency-momentum space for de Sitter correlators derived from the decomposition of spacetime isometry group representations, which simplifies perturbative computations by transforming propagators into rational functions and recasting loop integrals as orthogonality relations among group-theoretical coefficients.

Nathan Belrhali, Arthur Poisson, Sébastien Renaux-Petel, Denis Werth2026-04-17⚛️ hep-th

Solving bound-state equations in QCD2\text{QCD}_2 with bosonic and fermionic quarks

This paper investigates bound-state equations for exotic hadrons (tetraquarks and baryons) composed of bosonic and fermionic quarks in two-dimensional QCD using both light-front and equal-time quantization, deriving new equations in the finite momentum frame and numerically demonstrating how their wave functions converge to light-cone forms under continuous boosting.

Xiaolin Li, Yu Jia, Ying Li, Zhewen Mo2026-04-16⚛️ hep-ph

Chern-Simons gravitational term coupled to a spectator field

This paper investigates a multi-field inflationary scenario where the Chern-Simons gravitational term is coupled to a massive spectator field rather than the inflaton, deriving the resulting parity-violating interactions and demonstrating that they produce distinctive parity-odd shapes in primordial scalar-tensor bispectra while establishing constraints on the model's couplings and non-Gaussianity amplitudes.

Giorgio Orlando2026-04-16⚛️ hep-th

Comparative Study of Indicators of Chaos in the Closed and Open Dicke Model

This paper provides a systematic comparative study of chaos indicators in closed and open Dicke models, revealing that spectral form factors can exhibit chaotic signatures even in the regular closed regime while demonstrating that the dissipative spectral form factor robustly identifies the concurrence of the superradiant phase transition and a shift to Ginibre Unitary Ensemble statistics in the open system.

Prasad Pawar, Arpan Bhattacharyya, B. Prasanna Venkatesh2026-04-16⚛️ hep-th

Hyperscaling of Fidelity and Operator Estimations in the Critical Manifold

By formulating the renormalization group as a quantum channel, this paper establishes hyperscaling relations for ground-state fidelity in critical quantum field theories, demonstrating that expectation values of slow momentum modes can be accurately approximated by their fixed-point limits to improve the efficiency of numerical and analytical simulations.

Matheus H. Martins Costa, Flavio S. Nogueira, Jeroen van den Brink2026-04-16⚛️ hep-th

Functional Renormalization for Signal Detection: Dimensional Analysis and Dimensional Phase Transition for Nearly Continuous Spectra Effective Field Theory

This paper introduces a Functional Renormalization Group framework that detects signal onset in nearly continuous spectra by identifying a "dimensional phase transition" in the spectral geometry, enabling signal detection at ratios significantly lower than traditional BBP thresholds.

Riccardo Finotello, Vincent Lahoche, Dine Ousmane Samary2026-04-16⚛️ hep-th