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

Free-field construction of Carrollian WNW_N-algebras

This paper constructs explicit free-field realizations of Carrollian WNW_N-algebras via Miura transformation contractions, distinguishing between flipped and symmetric quantum cases that respectively recover Galilean isomorphisms and yield distinct algebras with classical structure constants, thereby providing essential tools for studying extended symmetries in Carrollian conformal field theories and flat space holography.

Stefan Fredenhagen, Lucas Hörl2026-03-11
⚛️ high-energy theory

Joule-Thomson expansion for quantum corrected AdS-Reissner-Nordström black holes in Kiselev spacetime with Barrow fractal entropy

This paper investigates the impact of Barrow's fractal entropy parameter Δ\Delta on the Joule-Thomson expansion and inversion temperature of quantum-corrected AdS-Reissner-Nordström black holes in Kiselev spacetime, utilizing numerical solutions to analyze temperature-pressure relationships and isenthalpic curves.

Everton M. C. Abreu, Henrique Boschi-Filho, Rafael A. Costa-Silva2026-03-11
⚛️ general relativity

Self-dual instantons and gravitating dyons in non-Abelian ModMax theory

This paper investigates the non-Abelian extension of ModMax electrodynamics by demonstrating the existence of self-dual instantons in various curved backgrounds, constructing multi-instanton solutions through perturbative methods, and deriving new gravitating configurations such as Euclidean wormholes when coupled to gravity.

Fabrizio Canfora, Cristóbal Corral, Borja Diez, Luis Guajardo, Julio Oliva2026-03-11
⚛️ phenomenology

Maximally Symmetric Boost-Invariant Solutions of the Boltzmann Equation in Foliated Geometries

This paper presents a unified exact solution to the relativistic Boltzmann equation for a boost-invariant conformal gas on dS3×RdS_3 \times \mathbb{R} across all constant-curvature slicings, which reproduces known Bjorken and Gubser flows while introducing a novel analytic "Grozdanov flow" for hyperbolic foliations that naturally encompasses both hydrodynamic and free-streaming regimes.

Mauricio Martinez, Christopher Plumberg2026-03-11
⚛️ quantum physics

Field Quantisations in Schwarzschild Spacetime: Theory versus Low-Energy Experiments

This paper demonstrates that the propagator of a Hawking particle in the far-horizon region of Schwarzschild spacetime, derived using quantum field theory in curved spacetime, differs from the result obtained via the path-integral formalism, thereby highlighting a theoretical discrepancy between the standard description of high-energy quantum fields in curved spacetime and the low-energy quantum mechanical phenomena observed in Earth's gravitational field.

Viacheslav A. Emelyanov2026-03-11
⚛️ high-energy theory

All loop soft photon theorems and higher spin currents on the celestial sphere

This paper demonstrates that all-loop soft photon theorems in the high-energy limit imply the existence of an infinite tower of higher-spin antiholomorphic currents on the celestial sphere, which transform under SL(2,R)RSL(2,\mathbb{R})_R and generate a classical algebra identified as the wedge subalgebra of w1+w_{1+\infty}.

Shamik Banerjee, Raju Mandal, Biswajit Sahoo2026-03-11
⚛️ high-energy theory

On BRST Lagrangian description of partially massless bosonic fields

This paper presents an exhaustive BRST Lagrangian description for partially massless bosonic fields in four-dimensional (A)dS space, demonstrating that the requirements of a Hermitian and nilpotent BRST charge restrict the theory to de Sitter space and yield a gauge-invariant Lagrangian with specific Stückelberg field content that correctly reproduces the mass shell conditions.

I. L. Buchbinder, S. A. Fedoruk, V. A. Krykhtin2026-03-11
⚛️ general relativity

Strong-deflection expansion of the deflection angle near a degenerate photon sphere

This paper presents a strong-deflection expansion for the light deflection angle near a degenerate photon sphere in static, spherically symmetric spacetimes, deriving a unique leading power-law term whose coefficient factorizes into a universal constant and a local geometric factor expressible via tidal measures or null-energy density profiles.

Takahisa Igata, Tadashi Sasaki, Naoki Tsukamoto2026-03-11