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

How Neutron Star Radii Encode the Dense-Matter Equation of State and Hadron-Quark Transition

This study employs a Bayesian analysis of mock neutron star radius measurements to demonstrate that while high-precision data can tightly constrain symmetry-energy parameters and transition densities, it cannot uniquely identify the underlying mass-radius topology or fully determine high-density quark-matter properties without complementary probes.

Bao-An Li, Xavier Grundler2026-08-14
⚛️ nuclear theory

Relativistic dynamical effects in proton emission: the Wentzel-Kramers-Brillouin method for 1+1 dimensional Dirac equation

This paper employs the WKB approximation on the 1+1 dimensional Dirac equation to derive a corrected relativistic penetration probability using an effective potential that systematically increases predicted proton emission half-lives, with effects reaching up to 84% for high orbital angular momentum cases like 144Tm^{144}\mathrm{Tm}.

Guangping Chen, Wenmin Deng, Ganlong Ding, Sibo Wang, Jing Peng, Haozhao Liang2026-08-14
⚛️ nuclear experiments

The iSTORM Instrument for Airborne Measurements of Gamma-Ray Emissions from Thunderstorms

The paper introduces iSTORM, a gamma-ray spectrometer developed by the U.S. Naval Research Laboratory for NASA's ER-2 aircraft that utilizes an array of CeBr₃ scintillators to successfully detect and characterize thunderstorm-related gamma-ray transients, including glows, terrestrial gamma-ray flashes, and newly discovered flickering gamma-ray flashes, during the ALOFT campaign.

Daniel Shy, J. Eric Grove, Bernard Phlips, Alena Schell, Mary Johnson-Rambert, Mason Quick, David Corredor, Scott Podgor (…)2026-08-12
⚛️ nuclear experiments

Extraction of baryon number susceptibilities at finite density from heavy-ion collisions

This paper presents the first Bayesian extraction of QCD baryon number susceptibilities from RHIC Beam Energy Scan data, revealing that while second-order susceptibilities align with lattice QCD predictions at low baryon density, they show significant enhancement at higher densities, whereas observed nonmonotonic trends in higher-order fluctuations can be explained by second-order effects and baryon number conservation without requiring irreducible multi-baryon correlations.

Grégoire Pihan, Roman Poberezhniuk, Volodymyr A. Kuznietsov, Volodymyr Vovchenko2026-08-12
⚛️ nuclear experiments

An improved direct limit on the muon electric dipole moment

Using data from the Fermilab Muon g-2 Experiment collected between 2019 and 2020, researchers established a new direct 95% confidence level limit on the muon electric dipole moment of dμ<1.10×1019 e|d_\mu|<1.10\times10^{-19}~e\cdotcm, finding the measured value consistent with zero.

2 Collaboration, D. P. Aguillard (University of Michigan, Ann Arbor, Michigan, USA), T. Albahri (University of Liverpool (…)2026-08-12
⚛️ nuclear experiments

Ab Initio\textit{Ab Initio} Exact Calculation of Strongly Correlated Nucleonic Matter

This study employs the exact full configuration-interaction quantum Monte Carlo method to demonstrate that symmetric nuclear matter is strikingly strongly correlated, thereby challenging the validity of previous *ab initio* calculations that relied on truncated many-body expansions.

Rongzhe Hu, Shaoliang Jin, Xin Zhen, Haoyu Shang, Junchen Pei, Furong Xu, Francesco Marino2026-08-11
⚛️ nuclear experiments

Long-lived opposite-parity states and the onset of octupole collectivity in atomic nuclei

This paper identifies a previously unrecognized empirical regularity in the low-energy spectra of odd-mass nuclei that serves as a reliable signature for octupole collectivity in neighboring even-even systems, offering a simple guide for selecting promising candidates for future experiments and theoretical studies.

Bui Minh Loc, Hoang Thai An, Nguyen Le Anh, Panagiota Papakonstantinou, Naftali Auerbach2026-08-11
🔬 atomic physics

Charge-state dynamics of barium ions in high-pressure xenon and its implications for Barium-Tagging in 0νββ0νββ searches

This paper reviews the charge-state dynamics of barium ions in high-pressure xenon and identifies three-body recombination as a physically plausible mechanism for converting Ba2+^{2+} to Ba+^+ on millisecond timescales, highlighting the critical need to treat the barium charge state as a dynamical quantity for the successful implementation of barium-tagging in neutrinoless double-beta decay searches.

A. Peralta Conde2026-08-10