⚛️ 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

Influence of secondary neutrons on alpha-particle induced reaction cross section measurement below the Coulomb barrier

This study demonstrates that unexpectedly high alpha-particle induced reaction cross sections for the nat^\mathrm{nat}Pt(α\alpha,x)195m^\mathrm{195m}Pt reaction below the Coulomb barrier are primarily caused by secondary neutrons rather than the direct alpha interaction, highlighting the critical need to account for such neutron-induced backgrounds in low-energy charged-particle activation measurements.

Yamato Fujii, Naohiko Otuka, Kenta Sugihara, Masayuki Aikawa, Hiromitsu Haba, Isao Murata2026-03-17
⚛️ nuclear experiments

Mass spectrometry of 75^{75}Zn ground and isomeric states from in-trap decay of 75^{75}Cu

This paper reports the first direct mass spectrometry investigation of the ground and isomeric states of 75^{75}Zn using ISOLTRAP, which corrects the ground-state mass excess, confirms the isomer's excitation energy, and provides strong evidence for a spin-1/2 ground state that aligns with large-scale shell-model predictions.

M. Müller, N. A. Althubiti, D. Atanasov, K. Blaum, R. B. Cakirli, T. E. Cocolios, F. Herfurth, S. Kreim, D. Lunney, V. M (…)2026-03-17
⚛️ nuclear experiments

Jet peak shapes based on two-particle angular correlations in lead-lead collisions at sNN\sqrt{{s_{\mathrm{NN}}}} = 5.02 TeV

Using CMS data from lead-lead and proton-proton collisions at sNN\sqrt{s_{\mathrm{NN}}} = 5.02 TeV, this study investigates the longitudinal invariance and shape evolution of jet-induced peaks in two-particle angular correlations, revealing that the peaks broaden significantly in pseudorapidity and exhibit increased longitudinal asymmetry as collision centrality and particle pseudorapidity increase.

CMS Collaboration2026-03-17
⚛️ nuclear experiments

Decay-Resolved Charge Changes from Radioactive Decays in Levitated Microparticles

This paper demonstrates a novel method for resolving event-by-event discrete charge changes in optically levitated silica microspheres caused by individual radioactive decays of implanted 212^{212}Pb and its daughters, by correlating millisecond-scale charge measurements with coincident scintillation detector signals to distinguish the charge ejection characteristics of α\alpha and β\beta decays.

Jiaxiang Wang, T. W. Penny, Yu-Han Tseng, Benjamin Siegel, David C. Moore2026-03-17
⚛️ nuclear experiments

π\pi, K, and p production in high-multiplicity pp collisions at s=13\sqrt{s} = 13 TeV

This paper presents new measurements of π\pi, K, and p production in high-multiplicity proton-proton collisions at 13 TeV that reveal mass-dependent spectral hardening and enhanced baryon-to-meson ratios similar to heavy-ion collisions, suggesting that particle production scales with charged-particle multiplicity rather than system size or collision energy, while highlighting that current Monte Carlo models fail to consistently describe all observed features.

ALICE Collaboration2026-03-16
⚛️ nuclear experiments

Measurement of correlations between elliptic flow and mean transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC

Using the full LHC Run 2 dataset, this ALICE study reports the first measurements of event-by-event correlations between elliptic flow and mean transverse momentum in pp, p-Pb, and Pb-Pb collisions, revealing non-monotonic trends and system-consistent values at low multiplicity that challenge current theoretical models and provide new constraints on the origin of collectivity in small collision systems.

ALICE Collaboration2026-03-16
⚛️ nuclear experiments

Hidden Light Scalars in Heavy-Ion Collisions: A Phenomenological Resolution to High-pTp_T Quarkonium Anomalies

This paper proposes that a minimal dark scalar with a mass of approximately 9.40 GeV, which shares high-pTp_T fragmentation scaling with NRQCD color-octet production, can simultaneously explain the anomalous high-pTp_T plateau in Υ(1S)\Upsilon(1S) nuclear modification factors, the vanishing elliptic flow, and the quarkonium polarization puzzle in heavy-ion collisions while evading historical low-pTp_T constraints.

Yi Yang2026-03-13