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.

Nucleon axial-vector form factor and radius from radiatively-corrected antineutrino scattering data

This paper applies radiative corrections to recent MINERvA antineutrino-hydrogen scattering data to extract the nucleon axial-vector form factor and radius, thereby enabling more precise comparisons with lattice QCD predictions and reducing uncertainties in neutrino interaction modeling.

Oleksandr Tomalak, Aaron S. Meyer, Clarence Wret, Tejin Cai, Richard J. Hill, Kevin S. McFarland2026-04-09⚛️ nucl-ex

Surface mechanisms governing long-term stability of GEM detectors in CO2_2-based gaseous mixtures

This study utilizes NAP-XPS and Raman spectroscopy to demonstrate that CO2_2-based mixtures promote the formation of stable, thin inorganic copper oxide layers on GEM electrodes through mild redox equilibria, thereby offering a mechanism for enhanced long-term detector stability compared to hydrocarbon-based systems.

Tiago F. Silva, Thiago B. Saramela, Willian W. R. A. da Silva, Camilla de S. Codeço, Maria do C. M. Alves, Jonder Morais, Niklaus U. Wetter, Anderson Z. de Freitas2026-04-09🔬 physics.app-ph

Non-Monotonicity of Transverse Momentum Correlations in Au + Au Collisions at RHIC

The STAR experiment's first measurements of two-particle transverse momentum correlations in fixed-target Au+Au collisions at sNN=3.07.7\sqrt{s_{NN}} = 3.0\text{--}7.7 GeV reveal a statistically significant (5σ\sim 5\sigma) non-monotonic dependence on collision energy and a breakdown of independent-source scaling in central collisions, providing new constraints on the QCD equation of state and potential evidence for a critical point.

STAR Collaboration2026-04-09⚛️ nucl-ex

Development of a Modular Current-Mode NaI(Tl) Detector Array for Parity Odd (n,{\gamma}) Cross Section Measurements

This paper presents the design, construction, and testing of a modular 24-detector NaI(Tl) array with custom pulse and current-mode electronics, developed by the NOPTREX Collaboration to measure parity-odd asymmetries in neutron-nucleus interactions, as demonstrated by the successful observation of the 0.7 eV parity-violating resonance in 139La at LANSCE.

J. T. Mills, J. G. Otero Munoz, K. Dickerson, I. Britt, A. Couture, J. Doskow, J. Fry, I. Ide, M. Kitaguchi, R. Kobayashi, M. Luxnat, A. Moseley, R. Nakabe, I. Novikov, K. Oikawa, T. Oku, T. Okudaira (…)2026-04-09⚛️ nucl-ex

Distribution amplitudes and functions of ground-state scalar and pseudoscalar charmonia

Using continuum Schwinger function methods, this paper challenges the simple hydrogen-like atomic model of ground-state scalar and pseudoscalar charmonia by revealing their complex internal structures, including nontrivial orbital angular momentum contributions and non-positive-definite distribution amplitudes, while providing theoretical benchmarks for understanding heavy-quark hadrons.

X. -Y. Zeng, Y. -Y. Xiao, Z. -N. Xu, C. D. Roberts, J. Rodríguez-Quintero2026-04-09⚛️ nucl-th

Measurement of inclusive J/ψJ/\psi polarization in Ru+Ru and Zr+Zr collisions at sNN=200\sqrt{s_{\rm NN}}=200 GeV at STAR

The STAR experiment at RHIC presents the first measurement of inclusive J/ψJ/\psi polarization in Ru+Ru and Zr+Zr collisions at sNN=200\sqrt{s_{\rm NN}}=200 GeV, finding that the polarization parameters are consistent with zero across various transverse momenta and collision centralities, aligning with previous p+pp+p measurements and transport-model calculations.

STAR Collaboration2026-04-09⚛️ nucl-ex