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.

⚛️ high-energy theory

Bubble wall velocity and nucleation rates in inverse holographic phase transitions

This paper investigates the dynamics of first-order inverse phase transitions in the Witten-Sakai-Sugimoto holographic QCD model by computing Euclidean bounce solutions to determine bubble nucleation rates and estimating bubble wall velocities for both deconfinement and chiral symmetry-restoring transitions.

Francesco Bigazzi, Aldo L. Cotrone, Natalia Pinzani-Fokeeva, Tommaso Trabocchi2026-07-14
⚛️ general relativity

Evading the CMB μμ-distortion bound on Supermassive Primordial Black Hole seeds with Non-Gaussian tails

This paper demonstrates that the CMB μ\mu-distortion bound, which typically precludes the formation of supermassive primordial black hole seeds via Gaussian perturbations, can be evaded by invoking non-Gaussian probability distribution tails—specifically power-law or sufficiently heavy log-normal shapes—that decouple the small-scale variance from the collapse probability.

Sanket Dave, Sheng-Feng Yan, Amara Ilyas, Yi-Fu Cai2026-07-14✓ Author reviewed
⚛️ high-energy theory

Carrollian limit of NS-NS and Heterotic Supergravity

This paper constructs the Carrollian limit of NS-NS and heterotic supergravity by employing an ultra-relativistic expansion with specific field scalings to ensure a finite action, derives the resulting equations of motion, demonstrates the finiteness of leading α\alpha'-corrected curvature terms, and explores connections to Carrollian string theory.

Romina Ballesteros, Eric Lescano, Sergio Patiño-López2026-07-14
⚛️ phenomenology

Darkly Charged ALPs

This paper extends the standard axion-like particle (ALP) framework by constructing an effective Lagrangian for ALPs carrying conserved dark charges, demonstrating that such particles cannot couple to Standard Model fields via dimension-5 operators and instead require dimension-6 interactions, while exploring their phenomenological implications and potential role as dark matter.

Nicolás M. Arenaza, Enrique Fernández-Martínez, Belén Gavela, Elizabeth E. Jenkins, Aneesh V. Manohar, Pablo Quílez, Tho (…)2026-07-14
⚛️ high-energy theory

Anomaly cancellation for two U(1)U(1) factors

This paper demonstrates that solving the abelian local anomaly cancellation conditions for 4D gauge theories with rank K1K \geq 1 is mathematically equivalent to finding (K1)(K-1)-dimensional projective linear subspaces on a specific cubic hypersurface, a reformulation that allows for the complete parametrization and geometric characterization of solutions in the rank-2 case via the Fano variety of lines in the Segre cubic primal.

Ben Gripaios, Khoi Le Nguyen Nguyen2026-07-14
⚛️ phenomenology

QED vertex and anomalous magnetic moment in the presence of a magnetic field

This paper computes the one-loop fermion-photon vertex in QED under a constant magnetic field, revealing how the background breaks Lorentz and time-reversal invariance to induce a complex tensor structure with direction-dependent anomalous magnetic moments, specific Landau level selection rules, and an infrared-regulated framework that eliminates the need for a photon mass.

Alejandro Ayala, Enrique Munoz, Juan Cristobal Rojas, Norberto Scoccola2026-07-14
⚛️ general relativity

Circular orbits and particle collisions close to charged black holes surrounded by scalar clouds

This paper investigates the motion and collisions of massive test particles around charged black holes with scalar hair, revealing that scalar fields enable up to four circular orbits and shift the critical charge required for infinite center-of-mass energy collisions compared to the standard Reissner-Nordström spacetime.

Maria Chivers, Betti Hartmann, Katherine Horton, Yves Brihaye2026-07-14