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.

Stochastic Inflation in Numerical Relativity

This paper re-derives gauge-invariant stochastic inflation equations incorporating all metric and scalar degrees of freedom, validates their numerical implementation within the BSSN formulation of Numerical Relativity across slow-roll and ultra slow-roll scenarios, and demonstrates their robustness in simulating fully non-linear stochastic dynamics with retained gradients and anisotropic expansion.

Yoann L. Launay, Gerasimos I. Rigopoulos, E. Paul S. Shellard2026-05-04⚛️ gr-qc

Bosonic and Fermionic love number of static acoustic black hole

This work calculates the static Love numbers for scalar and Dirac perturbations of acoustic black holes in (3+1) and (2+1) dimensions and shows that while scalar responses exhibit dimension-dependent behavior, including vanishing for certain modes, fermionic responses universally follow simple power laws, thereby highlighting fundamental qualitative differences between integer- and half-integer-spin fields in analog gravity systems.

Yongbin Du, Xiangdong Zhang2026-05-04⚛️ gr-qc

On the Asymptotic Causal Structure in Gravitational EFTs

This paper investigates the asymptotic causal structure of gravitational effective field theories in black-hole backgrounds, demonstrating that while genuine asymptotic superluminality can occur in spacetime dimensions greater than four, the four-dimensional case remains causally identical to the Schwarzschild solution regardless of higher-derivative corrections, necessitating alternative definitions of superluminality such as asymptotically AdS backgrounds or finite-distance cut-offs.

Bruno Bucciotti, Paolo Creminelli, Alessandro Longo, Warin Patrick McBlain, Enrico Trincherini2026-05-04⚛️ hep-th

Micron-sized Extra Dimensions and Primordial Black Holes: Charges, Rotating, and Memory Burdened

This paper proposes that six-dimensional primordial black holes with masses ranging from sub-gram to 10810^8 grams, stabilized by the memory burden effect or near-extremality in a TeV-scale extra dimension framework, can serve as dark matter candidates while offering distinctive signatures for detection at future colliders and atmospheric neutrino experiments.

George K. Leontaris, George Prampromis2026-05-04⚛️ hep-ph

Perturbative Analysis of CPT-Odd Lorentz-Violating Scalar QCD

This paper establishes the multiplicative renormalizability of CPT-odd Lorentz-violating scalar QCD with adjoint matter at the one-loop level by computing ultraviolet divergences in various Green's functions, demonstrating that all divergences can be absorbed into existing counterterms, and deriving the associated renormalization constants and β\beta-functions.

J. C. C. Felipe, L. C. T. Brito, A. C. Lehum, B. Altschul, A. Yu. Petrov2026-05-04⚛️ hep-th

Reflection Symmetry, APS Boundary Conditions, and Equivariant Spectral Flow on a Warped Cylinder

This paper investigates reflection symmetry and Atiyah-Patodi-Singer boundary conditions for twisted Dirac operators on a warped cylinder, establishing that reflection compatibility requires a specific holonomy quantization and demonstrating how spectral flow decomposes into equivariant or mod-two invariants depending on whether the holonomy is fixed or varying.

Taro Kimura, Sanchita Sharma2026-05-04🔢 math-ph