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.

⚛️ phenomenology

Natura Non Facit Saltum: An Analytical Model of Smooth Slow-Roll to Ultra-Slow-Roll Transition

This paper presents the first fully analytical single-field inflation model featuring a smooth transition from slow-roll to ultra-slow-roll phases, achieved by introducing a time-dependent effective mass term that maintains a continuously varying second slow-roll parameter while enabling precise tracking of the curvature power spectrum's parameter dependence.

Diego Cruces, Minxi He, Shi Pi, Jianing Wang, Masahide Yamaguchi, Yuhang Zhu2026-03-19
⚛️ high-energy theory

Emergent superconformal symmetry in the phase diagram of a 1D Z2\mathbb{Z}_{2} lattice gauge theory

By deriving an exact mapping of a one-dimensional Z2\mathbb{Z}_{2} lattice gauge theory to decoupled XXZ and transverse-field Ising chains, the authors combine analytical and numerical methods to reveal a full phase diagram featuring emergent superconformal symmetry along a multi-critical line where fermionic and bosonic velocities coincide.

Bachana Beradze, Mikheil Tsitsishvili, Sergej Moroz2026-03-19
⚛️ high-energy theory

The ABCs of Amplitudes, Bogoliubov and Crossing

This paper reinterprets the standard formulation of quantum field theory on dynamical black hole backgrounds by framing Bogoliubov coefficients as generalized scattering amplitudes and demonstrating how crossing, analyticity, and causality connect these amplitudes, ultimately mapping these results onto flat-space quantum field theory when the background is a coherent state.

Rafael Aoude, Asaad Elkhidir, Anton Ilderton, Donal O'Connell, Karthik Rajeev2026-03-19
⚛️ nuclear theory

Asymptotics of superfluid Bjorken flow

This paper investigates the late-time asymptotic behavior of superfluid Bjorken flow using Mueller-Israel-Stewart theory coupled to a complex scalar field, revealing that dissipative evolution leads to novel transseries solutions containing τalnτ\tau^{-a\ln \tau} factors that encode initial data dilution and exhibit either damped fall-off or oscillations depending on the condensate relaxation rate, with potential implications for heavy-ion collision experiments.

Alexander Soloviev, Michał Spaliński2026-03-19
⚛️ phenomenology

Embedding light dark matter and small neutrino mass in the flipped standard model

This paper proposes a flipped standard model extended by a U(1)NU(1)_N gauge group that naturally generates light neutrino masses via a radiative inverse seesaw mechanism and stabilizes a keV-scale fermionic dark matter candidate, whose overproduction is resolved through late-time entropy generation to satisfy cosmological constraints.

D. T. Huong, Phung Van Dong, A. E. Carcamo Hernandez2026-03-19
⚛️ high-energy theory

Fusion rule in conformal field theories and topological orders: A unified view of correspondence and (fractional) supersymmetry and their relation to topological holography

This paper proposes a unified framework for ZNZ_N extended chiral and bulk conformal field theories and their corresponding topological orders by explicitly constructing a "bulk semion" subalgebra that elucidates the correspondence between fusion rules, generalized symmetries, and topological holography, thereby offering a method to derive topological order data directly from bulk CFTs.

Yoshiki Fukusumi2026-03-18