Hep-Ex explores the fascinating intersection where particle physics meets experimental reality. This field investigates how scientists build massive detectors and accelerate particles to test the fundamental laws of nature, turning abstract theories into measurable data. It is the rigorous process of searching for new particles or forces that could reshape our understanding of the universe, often requiring years of collaboration and engineering.

At Gist.Science, we ensure these discoveries become accessible to everyone. We process every new preprint in this category directly from arXiv, generating both plain-language explanations for curious readers and detailed technical summaries for specialists. Our goal is to bridge the gap between complex experimental results and public understanding without losing scientific nuance.

Below are the latest papers in Hep-Ex, freshly summarized and ready for you to explore.

Revealing chiral-odd two-meson generalized distribution amplitudes in ee+(ππ)(ππ)e^- e^+ \to (\pi \pi) (\pi \pi) reactions

This paper demonstrates that chiral-odd dimeson generalized distribution amplitudes, which encode the spin-orbit correlation in spin-zero mesons, can be experimentally accessed in ee+(ππ)(ππ)e^- e^+ \to (\pi \pi)(\pi \pi) reactions through the interference between leading one-photon and two-photon exchange amplitudes, offering a direct path to probe this previously unmeasured sector of meson structure at facilities like BES III.

Shohini Bhattacharya, Renaud Boussarie, Bernard Pire, Lech Szymanowski2026-04-14⚛️ hep-lat

Event Reconstruction for Radio-Based In-Ice Neutrino Detectors with Neural Posterior Estimation

This paper introduces a deep neural network utilizing neural posterior estimation and conditional normalizing flows to reconstruct the direction, energy, and flavor of ultra-high-energy neutrinos from raw radio waveforms in in-ice detectors, achieving improved resolution and providing event-by-event uncertainty predictions for the first time.

Nils Heyer, Christian Glaser, Thorsten Glüsenkamp, Martin Ravn2026-04-14⚛️ hep-ex

Improving Neutrino Oscillation Measurements through Event Classification

This paper proposes a machine-learning-based strategy that classifies neutrino interaction types prior to energy reconstruction to exploit intrinsic kinematic differences, thereby reducing modeling uncertainties and improving the accuracy and sensitivity of next-generation long-baseline oscillation experiments like DUNE by 10–20%.

Sebastian A. R. Ellis, Daniel C. Hackett, Shirley Weishi Li, Pedro A. N. Machado, Karla Tame-Narvaez2026-04-14⚛️ hep-ex

K-shell ionization and characteristic x-ray radiation by high-energy electrons and positrons in oriented silicon crystals

This paper presents a detailed computer simulation method to investigate the non-monotonic evolution of K-shell ionization and characteristic x-ray radiation angular distributions from high-energy electrons and positrons traversing oriented silicon crystals across a wide energy range (1–1000 GeV), with a specific focus on the underlying physical mechanisms such as dechanneling.

S. V. Trofymenko, I. V. Kyryllin2026-04-14🔬 physics.atom-ph

Lessons from the first JUNO results

This paper analyzes the first JUNO reactor neutrino data to demonstrate that, when combined with global oscillation constraints and atmospheric neutrino results, it yields a world-leading precision on Δm212\Delta m^2_{21} and θ12\theta_{12} while providing a slight but statistically significant preference for the Normal Ordering of neutrino masses.

Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni, Ivan Martinez-Soler, Joao Paulo Pinheiro, Thomas Schwetz2026-04-14⚛️ hep-ex

Contributions of the subprocesses ρ(770,1450,1700)KKˉρ(770,1450,1700)\to K \bar{K} and ω(782,1420,1650)KKˉω(782,1420,1650)\to K \bar{K} for the three-body decays Bη()KKˉB\to η^{(\prime)} K\bar{K}

Using the perturbative QCD approach, this paper analyzes resonance contributions from ρ\rho and ω\omega mesons and their excited states to the three-body decays Bη()KKˉB\to \eta^{(\prime)} K\bar{K}, revealing that virtual contributions from the tails of ρ(770)\rho(770) and ω(782)\omega(782) are comparable to those from higher resonances and thus constitute a significant component of these decays.

Ming-Yue Jia, Jia-Xin Wang, Li-Fei Yang, Ai-Jun Ma, Wen-Fei Wang2026-04-14⚛️ hep-ex

Toward Neutrino and Dark Matter Detection with Ancient Minerals: TEM Study of Heavy-Ion Tracks in Olivine

This study validates olivine as a promising candidate for the "paleo-detector" technique by using STEM to characterize heavy-ion tracks at various depths without etching, confirming that observed changes in track continuity align with SRIM simulation predictions regarding the transition between electronic and nuclear stopping power.

Andrew Calabrese-Day, Emilie LaVoie-Ingram, Kathryn Ream, Hannah Ross, Joshua Spitz, Patrick Stengel, Kai Sun, Alexander Takla2026-04-14⚛️ nucl-ex