449 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.
This paper reports the first direct observation of three-neutron emission from He, identifying a resonance-like structure consistent with sequential decay via He and finding no evidence for a trineutron resonance or significant three-neutron correlations beyond standard two-body interactions.
This paper presents a novel Monte Carlo model using a classical trajectory approximation to calculate particle pair correlation functions in heavy-ion collisions, demonstrating that the method successfully fits experimental data and is highly sensitive to the source's spatio-temporal extent while being largely independent of the temperature parameter, thus advancing femtoscopic interferometry in the Fermi energy domain.
This paper establishes robust upper bounds on heavy QCD axion lifetimes as low as 0.017 seconds by analyzing Big Bang Nucleosynthesis constraints on neutron-to-proton ratio modifications from hadronic decays, a limit that surpasses projected future CMB bounds and remains largely insensitive to hadronic uncertainties.
This paper presents the first in-beam demonstration that chemically hyperpolarized materials produced via the SABRE method serve as viable, radiation-resistant targets and detector media for nuclear and particle physics, offering a cost-effective alternative to traditional cryogenic spin-polarized targets without suffering depolarization under intense radiation.
This paper reports the first mass measurements of neutron-rich ytterbium isotopes (Yb), revealing an anomalously strong proton-neutron interaction in the "hole-hole" regime below Pb that challenges current mean-field models and aids in refining predictions for the r-process waiting point.
This paper demonstrates that a portable, two-meter neutron Time of Flight system utilizing Neutron Resonance Transmission Analysis can successfully identify and quantify the isotopic composition of special nuclear materials like HEU and reactor-grade plutonium within two hours with high accuracy, offering a promising tool for future arms control verification.
This paper synthesizes new threshold measurements of production from JLab experiments (007 and CLAS12) with previous GlueX data to confirm a consistent phenomenological determination of the -proton scattering length, while highlighting how upcoming J-PARC measurements will further clarify the systematic trend of vector meson-nucleon interactions predicted by the "young vector meson" hypothesis.
This paper presents a comprehensive overview of recent ALICE measurements from Run 2 and Run 3 on photon-induced processes in ultra-peripheral collisions, covering exclusive vector meson photoproduction, nuclear breakup mechanisms, and inclusive photonuclear interactions to probe gluon saturation, quantum interference, and particle production dynamics in nuclear environments.
This study utilizes an improved multi-phase transport model to analyze Pb+Pb collisions at the LHC, finding that while anisotropic flow measurements can exclude large neutron skins in Pb, they exhibit a geometric degeneracy that limits their ability to precisely distinguish between zero and moderate neutron skin values.
The NUCLEUS experiment characterizes the unidentified low energy excess in its sapphire detector by demonstrating that the excess rate is independent of particle background levels but decreases with slower cooling procedures, following a universal power-law decay over time.