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.

Spatially covariant gravity with two degrees of freedom: A perturbative analysis up to cubic order

This paper employs a perturbative analysis of polynomial-type spatially covariant gravity Lagrangians up to cubic order around a cosmological background to derive specific coefficient conditions that eliminate the scalar mode, thereby identifying five explicit models that propagate only the two tensorial degrees of freedom characteristic of general relativity.

Yang Yu, Yu-Min Hu, Xian Gao2026-04-17⚛️ gr-qc

Fermionic modes of D-instanton wormholes from broken local supersymmetry

This paper demonstrates that in the low-energy supergravity treatment of type IIB string theory on D-instanton wormhole profiles, the modes of broken local supersymmetry in the bulk generate non-vanishing fermionic diagonal modes on the boundaries via current-current two-point functions, extending these results to multi D-instanton and general Euclidean brane scenarios.

H. Itoyama, Hikaru Kawai, Shoichi Kawamoto2026-04-17⚛️ hep-th

Loop integrals in de Sitter spacetime: The parity-split IBP system and \dilog\di\log-form differential equations

This paper develops integration-by-parts reduction and differential equations for massive loop integrals in de Sitter spacetime, revealing a parity-split IBP structure, formulating a Baikov representation, and verifying a conjecture that Hankel-function-based integrands yield \dilog\di\log-form differential equations.

Jiaqi Chen, Bo Feng, Zhehan Qin, Yi-Xiao Tao2026-04-17⚛️ hep-th

An efficient Wavelet-Based Hamiltonian Formulation of Quantum Field Theories using Flow-Equations

This paper proposes an efficient framework for analyzing quantum field theories by combining a Daubechies wavelet basis with Similarity Renormalization Group flow equations to systematically decouple degrees of freedom across scales, thereby enabling the extraction of low-energy spectra from reduced-resolution Hamiltonian blocks with significantly lower computational cost.

Mrinmoy Basak, Debsubhra Chakraborty, Nilmani Mathur2026-04-17⚛️ hep-lat