⚛️ Category

nucl-ex

677 papers

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.

⚛️ nuclear experiments

Measurement of jet photoproduction in ultra-peripheral Pb+Pb collisions without nuclear breakup at sNN=5.02\sqrt{s_\mathrm{NN}} = 5.02 TeV with the ATLAS detector

Using 2018 ATLAS data from ultra-peripheral Pb+Pb collisions at sNN=5.02\sqrt{s_\mathrm{NN}} = 5.02 TeV, this paper presents the first measurement of γ+I ⁣ ⁣P→jets\gamma+I\!\!P\rightarrow\mathrm{jets} cross-sections in nuclear collisions by statistically separating photon--pomeron, photon--photon, and peripheral photonuclear processes in non-breakup events via a template fit of rapidity gaps, while also confirming that such events select a more peripheral collision class.

ATLAS Collaboration2026-04-28
⚛️ nuclear experiments

Quenching of the proton π0p3/2\pi0p_{3/2}-π0p1/2\pi0p_{1/2} spin-orbit splitting in 20^{20}O and the effect of the tensor force

Using the ACTAR TPC setup at GANIL, researchers measured the Z=6Z=6 shell gap in 20O^{20}\text{O} via one-proton removal reactions, finding a reduced proton spin-orbit splitting of 5.30(14) MeV that supports the influence of the tensor force but contradicts previous studies suggesting a large gap.

J. Lois-Fuentes, B. Fernández-Domínguez, T. Roger, F. Delaunay, M. Lozano-González, O. Sorlin, T. Otsuka, T. Suzuki, N. (…)2026-04-28
⚛️ nuclear experiments

Phenomenological refinement of pp-dd elastic scattering descriptions towards the 3NF study in nuclei via the ($p,pd$) reaction

This contribution develops a phenomenological approach that refines the elastic scattering cross sections for pp-dd interactions in free space by decomposing the scattering amplitude into a 2N interaction component and a residual component fitted with energy-dependent Legendre polynomials, thereby establishing a crucial foundation for future studies of three-nucleon forces in nuclei via the ($p,pd$) reaction.

Yoshiki Chazono, Tokuro Fukui, Futoshi Minato, Yukinobu Watanabe, Kazuyuki Ogata2026-04-27
⚛️ nuclear experiments

Bayesian Constraints on the Neutron Star Equation of State with a Smooth Hadron-Quark Crossover

This paper employs Bayesian inference within a unified framework to constrain the neutron star equation of state across hadronic, crossover, and quark phases, revealing that current multi-messenger data strongly limit low-to-intermediate density nuclear symmetry energy parameters while leaving high-density quark matter properties largely unconstrained until next-generation observations become available.

Xavier Grundler, Bao-An Li2026-04-23
⚛️ nuclear theory

Investigation of Nonlinear Collective Dynamics in Relativistic Heavy-Ion Collisions Using A Multi-Phase Transport Model

Using the AMPT model, this study demonstrates that while the nonlinear response coefficient χ4,22\chi_{4,22} grows dynamically during the evolution of relativistic heavy-ion collisions, the ratio of this coefficient between U+U and Au+Au systems remains stable across all stages, effectively isolating intrinsic initial-state geometric correlations to support experimental efforts in extracting high-order nuclear structure.

Zhi-Jie Yang, Hao-jie Xu, Jie Zhao, Hanlin Li2026-04-23
⚛️ nuclear experiments

Observation of impact parameter dependent modifications of nuclear parton distributions in photonuclear Pb+Pb collisions at sNN=5.02\sqrt{s_\mathrm{NN}} = 5.02 TeV with the ATLAS detector

Using 2018 ATLAS data from ultra-peripheral Pb+Pb collisions at 5.02 TeV, this study provides the first experimental observation that nuclear parton distribution modifications vary with impact parameter, evidenced by a significant difference in γ+A\gamma+A jet production cross-sections between collisions with and without forward neutron emission.

ATLAS Collaboration2026-04-23