Hep-Ph explores the fundamental forces that govern how particles interact and behave at the smallest scales imaginable. This field bridges the gap between theoretical predictions and experimental reality, helping scientists understand the building blocks of our universe without getting lost in complex mathematics. Whether investigating the Higgs boson or searching for new physics beyond current models, these studies push the boundaries of human knowledge about matter and energy.

At Gist.Science, we process every new preprint in this category as soon as it appears on arXiv. We strip away the dense jargon to offer both accessible plain-language explanations and detailed technical summaries, ensuring that groundbreaking research is understandable to everyone from students to seasoned experts. Below are the latest papers in this dynamic field, ready for you to explore with clarity and depth.

⚛️ phenomenology

Supermassive black hole formation in the initial collapse of axion dark matter

This paper proposes that the rethermalization of axion dark matter during the initial collapse of large-scale overdensities near cosmic dawn efficiently transports angular momentum outward, leading to the formation of supermassive black holes with masses ranging from 10510^5 to a few times 1010 M⊙10^{10}~M_\odot for both QCD axions and heavier axion-like particles.

Pierre Sikivie, Yuxin Zhao2026-04-01
⚛️ nuclear theory

Observation of a dynamic magneto-chiral instability in photoexcited tellurium

Using time-domain terahertz emission spectroscopy, researchers observed a dynamic magneto-chiral instability in photoexcited tellurium, where an electric current parallel to a magnetic field amplifies electromagnetic waves, offering a promising mechanism for THz-wave amplification in chiral materials.

Yijing Huang, Nick Abboud, Yinchuan Lv, Penghao Zhu, Azel Murzabekova, Changjun Lee, Emma A. Pappas, Dominic Petruzzi, J (…)2026-04-01
⚛️ high-energy theory

Dynamics of Cosmic Superstrings and the Overshoot Problem

This paper employs dynamical systems analysis to demonstrate that an initial population of NS5-brane wrapped strings can resolve the cosmological overshoot problem for the volume modulus by transferring energy to it, while simultaneously predicting a potentially detectable gravitational wave signal from the resulting high energy density of cosmic superstrings during modulus oscillations.

Luca Brunelli, Michele Cicoli, Francisco Gil Pedro2026-04-01
⚛️ nuclear theory

Initial-state geometry and multiplicity distributions in pp and pPb collisions

This study utilizes Monte Carlo simulations based on the Color Glass Condensate formalism to demonstrate that multiplicity distributions in proton-proton and proton-lead collisions can distinguish between different initial-state proton geometries, specifically testing the three-quark Y-shape baryon junction model, while highlighting the critical importance of accounting for intrinsic saturation scale fluctuations.

R. Terra, A. V. Giannini, F. S. Navarra2026-04-01
⚛️ phenomenology

Exploring Ultra-Slow-Roll Inflation in Composite Pseudo-Nambu-Goldstone Boson Models: Implications for Primordial Black Holes and Gravitational Waves

This paper investigates inflation in composite pseudo-Nambu-Goldstone boson models where non-minimal coupling induces ultra-slow-roll dynamics, predicting the formation of ultra-light primordial black holes as potential dark matter candidates and a high-frequency gravitational wave signal that motivates the development of future detectors capable of probing currently inaccessible frequency regimes.

Marco Merchand2026-04-01