Nucl-Ex represents the dynamic frontier where scientists probe the fundamental building blocks of matter through high-energy experiments. By smashing particles together at incredible speeds or observing rare cosmic events, researchers uncover the forces that govern our universe and test the limits of our current understanding of physics.

At Gist.Science, we ensure these breakthroughs reach a broader audience by processing every new preprint in this field directly from arXiv. For each study, we provide both a clear, plain-language explanation of the core discoveries and a detailed technical summary for those seeking deeper insights. Below are the latest papers in nuclear experiment research, curated to help you stay informed on the latest developments from the lab.

Next Generation Ta-STJ Sensor Arrays for BSM Physics Searches

To address systematic calibration discrepancies caused by resistive crosstalk and laser instability in Phase-III, the BeEST experiment's Phase-IV introduces redesigned STJ sensor arrays with individual ground wires and a more stable UV laser, successfully eliminating artifacts while maintaining high energy resolution for future BSM physics searches.

Joseph P. T. Templet, Spencer Fretwell, Andrew Marino, Robin Cantor, Ad Hall, Connor Bray, Caitlyn Stone-Whitehead, Inwook Kim, Francisco Ponce, Wouter Van De Pontseele, Kyle G. Leach, Stephan Friedri (…)2026-03-03⚛️ nucl-ex

Leptonic first-row correlation and unitarity waiting for further JUNO tests

The paper conjectures a remarkable correlation among the first-row elements of the lepton mixing matrix, Ue12=2(Ue22+Ue32)|U_{e1}|^2 = 2(|U_{e2}|^2 + |U_{e3}|^2), which remains consistent with unitarity limits and is currently supported by JUNO and Daya Bay precision measurements at nearly the 1σ1\sigma confidence level.

Zhi-zhong Xing2026-03-03⚛️ nucl-ex

Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED

This paper presents an extension of the MadGraph5_aMC@NLO framework that enables automated leading-order calculations for S-wave quarkonium and leptonium production within NRQCD and NRQED formalisms, offering seamless integration with Beyond the Standard Model scenarios and highlighting the necessity of careful theoretical analysis beyond simple velocity-scaling rules.

Alice Colpani Serri, Chris A. Flett, Jean-Philippe Lansberg, Olivier Mattelaer, Hua-Sheng Shao, Lukas Simon2026-03-03⚛️ nucl-ex

Calibration of an Irradiated Prototype for the EIC Zero-Degree Calorimeter

This study demonstrates that a prototype Electron-Ion Collider Zero-Degree Calorimeter, after being irradiated to simulate one year of full-luminosity operation, can be successfully calibrated on a channel-by-channel basis using cosmic-ray data, maintaining a sufficient signal-to-noise ratio despite significant and non-uniform radiation damage to its SiPMs.

Weibin Zhang, Xilin Liang, Sean Preins, Miguel Arratia2026-03-03⚛️ nucl-ex

Search for Light Dark Sectors Using Electron-Photon Collisions

This paper proposes a novel experimental search for dark photons at electron accelerators using inverse Compton scattering (γeAe\gamma e^- \rightarrow A' e^-) with laser photons and a 3 GeV electron beam, demonstrating that this setup can probe unexplored regions of dark sector parameter space through photon counting techniques.

L. Angel, G. Casse, G. Gambini, A. S. de Jesus, V. Kozhuharov, A. Machado, F. S. Queiroz, E. Segreto, J. Smirnov2026-03-03⚛️ nucl-ex

First measurement of ϕϕ meson production in 30 GeV proton-nucleus reactions via di-electron decay at J-PARC

This paper reports the first measurement of ϕ\phi meson production via the di-electron decay channel in 30 GeV proton-carbon and proton-copper interactions at J-PARC, yielding total cross sections of 2.0 mb and 10.3 mb respectively and establishing a mass-number dependence parameter α\alpha of 0.99 that aligns with existing proton-proton data.

PARC E16 collaboration, Satomi Nakasuga, Yuhei Morino, Kazuya Aoki, Yoki Aramaki, Daichi Arimizu, Sakiko Ashikaga, Wen-Chen Chang, Ren Ejima, Hideto En'yo, Dairon Rodriguez Garces, Johann M. Heuser, R (…)2026-03-03⚛️ nucl-ex