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.

Space- vs Time-dependence in taming the infrared instability of projectable Ho\v rava Gravity

This paper investigates whether higher-derivative terms in projectable Hořava gravity can stabilize its infrared instability by evolving into static, inhomogeneous solutions, but concludes that no such static endpoints exist, thereby reinforcing the necessity of time-dependent mechanisms like cosmic expansion to conceal the instability.

Shinji Mukohyama, Jury Radkovski, Sergey Sibiryakov2026-04-13⚛️ hep-th

D2-brane probes of non-toric cDV threefolds via monopole superpotentials

This paper establishes a framework for constructing worldvolume gauge theories on D2-branes probing non-toric compound Du Val Calabi-Yau threefolds by encoding their geometry as ADE surface fibrations in a Higgs field, which induces N=2\mathcal{N}=2 deformations via monopole superpotentials that, through 3d mirror symmetry, reproduce the mathematical quiver-collapsing mechanism.

Andrés Collinucci, Marina Moleti, Roberto Valandro2026-04-13⚛️ hep-th

Relativistic single-electron wavepacket in quantum electromagnetic fields II: Quantum radiation emitted by a uniformly accelerated electron

This paper computes the quantum radiation emitted by relativistic single-electron wavepackets, demonstrating that while radiation vanishes for electrons at rest, uniformly accelerated electrons exhibit secularly growing power with a classical interpretation, and that proposed experimental signatures of the Unruh effect in specific "blind spots" are dominated by transverse deviation correlators rather than the Unruh effect itself.

Shih-Yuin Lin, Bei-Lok Hu2026-04-13⚛️ hep-th

Black Hole Dynamics at Fifth Post-Newtonian Order

This paper derives the total even-in-velocity scattering observables at fifth post-Newtonian order using a worldline action and Feynman's i0+i0^+ prescription to establish a universal conservative Hamiltonian and resolve ambiguities in Effective One Body coefficients, while demonstrating the superiority of this approach over the γ-3\gamma\text{-}3 prescription in preserving expected theoretical structures.

Rafael A. Porto, Massimiliano M. Riva2026-04-13⚛️ gr-qc

2020' Five-Point Function of N=4\mathcal{N}=4 SYM and Stringy Corrections

This paper employs a bootstrap approach combining Mellin amplitude factorization, supersymmetric constraints, and protected observables to compute the first stringy correction to the five-point correlation function of 20' operators in N=4\mathcal{N}=4 super Yang-Mills, leaving only a single undetermined coefficient that is constrained by non-protected CFT data and flat-space limits, while also deriving corrections for related four-point correlators.

Joao Vilas Boas2026-04-10⚛️ hep-th

Freeze-out and spectral running of primordial gravitational waves in viscous cosmology

This paper investigates how shear viscosity in the post-inflationary universe modifies the propagation of primordial gravitational waves, demonstrating that viscosity induces additional damping and spectral running—such as a blue tilt from freeze-out in the electron-photon-baryon plasma—thereby altering the gravitational wave energy density spectrum by approximately 10310^{-3}.

Giuseppe Fanizza, Eliseo Pavone, Luigi Tedesco2026-04-10⚛️ gr-qc