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

Charge-exchange reactions with pion and kaon beams in the NA64h experiment at CERN

This paper presents a new approach for the NA64h experiment at CERN to search for dark sector particles via invisible decays and oscillations of neutral mesons produced in charge-exchange reactions with pion and kaon beams, focusing on the accurate evaluation of the necessary cross sections to estimate the experiment's sensitivity.

Sergei N. Gninenko, Sergey Kuleshov, Valery E. Lyubovitskij, Alexey S. Zhevlakov2026-07-31
⚛️ phenomenology

GGI Lectures on Large-Scale Structure Perturbation Theory (Effective Field Theory)

This paper provides a pedagogical introduction to non-linear perturbation theory for cosmological large-scale structure, specifically developing the Effective Field Theory framework from scratch to model galaxy clustering, address the limitations of Standard Perturbation Theory, and incorporate galaxy bias and redshift-space distortions for undergraduate and beginning graduate students.

Mikhail M. Ivanov2026-07-31
⚛️ nuclear theory

Estimating amplitude of matter density fluctuations in solar and supernova models using neutrino flavor evolution

This paper demonstrates that statistical data assimilation can effectively estimate the amplitude of matter density fluctuations in solar and core-collapse supernova models by analyzing neutrino flavor evolution, with the method showing particular reliability in solar scenarios.

Caroline Laber-Smith, Hansen Torres, Lily Newkirk, Dhriti Rathod, A. Baha Balantekin, Amol V. Patwardhan2026-07-31
🔭 astrophysics

Schwinger Current in de Sitter Space

This paper demonstrates that by imposing a physically consistent renormalization condition and accounting for the required tachyonic photon mass in de Sitter space, the Schwinger current for charged fermions and scalars is finite and positive even in the massless limit, thereby resolving previous issues of negative infrared divergence and offering new insights into magnetogenesis and inflationary dark matter production.

Mar Bastero-Gil, Paulo B. Ferraz, António Torres Manso, Lorenzo Ubaldi, Roberto Vega-Morales2026-07-30
⚛️ lattice

Lattice determination of the neutrino background for J/ψ→γ+invisibleJ/ψ\rightarrow γ+ \textrm{invisible}

This paper presents the first lattice QCD calculation of the irreducible Standard Model background for the decay J/ψ→γννˉJ/\psi \to \gamma \nu\bar{\nu}, determining its branching fraction to be 1.04(7)(8)×10−101.04(7)(8)\times 10^{-10} and providing a critical theoretical benchmark for future dark matter searches via radiative invisible quarkonium decays.

Yu Meng, Ning Li, Chuan Liu, Haobo Yan, Ke-Long Zhang, Xue-Ze Zhang2026-07-30
⚛️ lattice

Neural quantum states for non-Abelian lattice gauge theories with dynamical fermions

This paper presents a sign-problem-free variational Monte Carlo framework using neural quantum states and gauge-covariant Gaussian fermionic corrections to determine the ground state of continuous SU(2) lattice gauge theories coupled to dynamical staggered fermions, successfully validating the method against perturbation theory and mapping the system's phase diagram.

Gabriel Rouxinol, Julian Bender, Michele Grossi, Patrick Emonts, Jad C. Halimeh2026-07-30