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

On the Validity of the Effective Theory of (Multi-)Field Inflation

Motivated by trans-Planckian issues, this paper establishes the Hilbert space and quantum amplitudes for general multi-field inflation without relying on the sub-horizon limit by utilizing Dirac brackets to handle field mixings and constraints, thereby enabling estimates of higher-derivative corrections in terms of slow-roll parameters and cutoff scales for various inflationary models.

Andrea Ambrosi de Magistris, Alberto Salvio2026-05-28
⚛️ phenomenology

Probing Dynamical Inverse Seesaw with Low-frequency Gravitational Waves

This paper proposes that the dynamical inverse seesaw mechanism, which explains light neutrino masses through a low-scale lepton number-violating term, can be probed via low-frequency stochastic gravitational waves detected by pulsar timing arrays, offering a unique window into parameter space with small active-sterile mixing that is inaccessible to conventional particle physics experiments.

Debasish Borah, Sounak Dutta, Partha Kumar Paul, Indrajit Saha, Narendra Sahu2026-05-28
⚛️ phenomenology

From WIMP to FIMP during reheating: collider vs non-collider probes for p-wave annihilation

This paper investigates how collider and non-collider probes can constrain the reheating temperature, dark matter mass, and interaction scale of a scenario where dark matter transitions from WIMP to FIMP production via p-wave suppressed interactions, demonstrating that collider experiments are uniquely powerful in constraining derivative operators that are weakly limited by astrophysical observations.

Dipankar Pradhan, Niloy Mondal, Abhik Sarkar, Anupam Ghosh, Shashwat Sharma, Mathew Thomas Arun, Basabendu Barman2026-05-28
🔬 condensed matter

Spontaneous breaking of non-invertible symmetries and duality to beyond-Landau transitions

This paper investigates spontaneous breaking of non-invertible symmetries in lattice models, demonstrating that such phases are characterized by long-range correlations of local order parameters obeying generalized algebraic structures and can be dual to deconfined quantum critical points of invertible symmetries via generalized gauging, thereby providing a systematic framework for studying beyond-Landau phase transitions.

Xie Chen, Shang Liu, Da-chuan Lu, Nathanan Tantivasadakarn2026-05-28
⚛️ high-energy theory

Sampling Triangulations and Calabi-Yau Threefolds with Autoregressive GNNs

The paper introduces `dualGNN`, a compact and efficient autoregressive graph neural network that leverages signed circuits from oriented matroid theory to uniformly sample fine, regular triangulations of convex polytopes, enabling the unprecedented generation of Calabi-Yau threefolds at high Hodge numbers with significantly reduced computational resources compared to prior methods.

Nate MacFadden2026-05-28
⚛️ phenomenology

CPCP phase structure of QCD from functional renormalization group

Using the functional renormalization group, this study demonstrates that in QCD-like theories, a CPCP-violating four-fermion interaction becomes relevant in the chirally broken phase while the running of the θ\theta-parameter is strongly suppressed toward the infrared in the presence of finite quark mass, thereby clarifying how strong-CPCP effects generated at high energies are transferred to low-energy physics.

Yuepeng Guan, Shinya Matsuzaki, Masatoshi Yamada2026-05-28
⚛️ high-energy theory

Worldline Higher Spin Gravity

This paper proposes a worldline formulation of higher-spin gravity in AdS4\mathrm{AdS}_4 based on a twistor action and a double-line interpretation that enables the construction of covariant vertex operators, allowing the computation of correlation functions that reproduce those of free vector models while suggesting a deeper connection to string theory via a Poisson sigma model embedding.

Minkyeu Cho, Euihun Joung, Taehwan Oh, Tung Tran2026-05-28
⚛️ high-energy theory

The effective gravitational action of a massless chiral fermion and the absence of parity-odd contributions

Using the BPHZL renormalization scheme, the paper proves that the renormalized gravitational effective action for a massless chiral fermion up to fourth order in graviton fields contains no parity-odd contributions, is equivalent to half the action of a non-chiral Dirac fermion modulo parity-even counterterms, and yields a purely parity-even Weyl anomaly equal to half that of a Dirac fermion.

J. Anero, Carmelo P. Martin2026-05-28