nucl-ex papers | Gist.Science

Calculation of Particle Pair Correlation Functions with Classical Trajectory Approximation

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.

Sheng Xiao, Yijie Wang, Zhigang XiaoWed, 11 Ma⚛️ nucl-ex

Fragmentation of Nuclear Remnants in Electron-Nucleus Collisions at High Energy as a Nonextensive Process

This paper proposes that the fragmentation of nuclear remnants in high-energy electron-nucleus collisions is a nonextensive process, utilizing partitioning methods and Tsallis statistics to predict multiplicity distributions for excited nuclei like $^9$ Be, $^{12}$ C, and $^{16}$ O while highlighting potential deviations caused by $\alpha$ -cluster structures.

Ting-Ting Duan, Sahanaa Büriechin, Hai-Ling Lao, Fu-Hu Liu, Khusniddin K. OlimovWed, 11 Ma⚛️ nucl-ex

Measurement of Kaon Directed Flow in Au+Au Collisions in the High Baryon Density Region

This paper presents STAR experiment measurements of directed flow ( $v_1$ ) for kaons in low-energy Au+Au collisions, revealing a strong $p_\text{T}$ -dependent slope that transitions from negative to positive and suggesting that spectator shadowing effects are crucial for explaining the observed low- $p_\text{T}$ kaon anti-flow in the high baryon density region.

STAR CollaborationWed, 11 Ma⚛️ nucl-ex

Isotopic Measurements of SNM using a Portable Neutron Resonance Transmission System for Arms Control

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.

Mital A. Zalavadia, Ethan A. Klein, Michael E. Moore, Jonathan A. Kulisek, Farheen Naqvi, Glen A. Warren, Areg DanagoulianWed, 11 Ma⚛️ nucl-ex

Overview of recent UPC measurements

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.

Anisa Khatun (on behalf of the ALICE Collaboration)Wed, 11 Ma⚛️ nucl-ex

Chemically-polarized material for nuclear and particle physics

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.

Benjamin G. Collins, Daniel P. Watts, Mikhail Bashkanov, Stephen Kay, Simon B. Duckett, Andreas Thomas, Dmitry Budker, Danila Barskiy, Raphael KircherWed, 11 Ma🔬 physics

Effects of shape coexistence and configuration mixing on low-lying states in tellurium isotopes

This paper utilizes the interacting boson model with configuration mixing, informed by microscopic mean-field calculations, to demonstrate that strong mixing between intruder prolate and normal oblate configurations drives the parabolic shape-coexistence behavior observed in the low-lying states of even-even tellurium isotopes near the middle of the neutron major shell.

Kosuke NomuraWed, 11 Ma⚛️ nucl-th

Mass measurements of $^{179-184}$ Yb identify an anomalous proton-neutron interaction

This paper reports the first mass measurements of neutron-rich ytterbium isotopes ( $^{179-184}$ Yb), revealing an anomalously strong proton-neutron interaction in the "hole-hole" regime below $^{208}$ Pb that challenges current mean-field models and aids in refining predictions for the $N=126$ r-process waiting point.

C. L. Brown, J. Ash, B. Ashrafkhani, J. Bergmann, T. Brunner, J. D. Cardona, R. B. Cakirli, R. F. Casten, C. Chambers, T. Dickel, G. Gwinner, Z. Hockenbery, A. Jacobs, J. Lassen, R. Li, D. Lunney, S. Kakkar, F. Maldonado Millán, N. Minkov, A. Mollaebrahimi, E. M. Lykiardopoulou, S. Paul, W. R. Plaß, W. S. Porter, D. Ray, M. P. Reiter, A. Ridley, C. Scheidenberger, R. Simpson, C. Walls, Y. Wang, A. P. Weaver, A. A. KwiatkowskiWed, 11 Ma⚛️ nucl-ex

Weak Charge Form Factor Determination at the Electron-Ion Collider

This paper proposes that the Electron-Ion Collider (EIC) can significantly advance the determination of nuclear weak charge form factors by providing continuous momentum transfer data across a wide range of nuclei, thereby resolving theoretical degeneracies in neutron density distributions that current single-point fixed-target experiments cannot address.

Hooman Davoudiasl, Hongkai Liu, Sonny Mantry, Ethan T. NeilWed, 11 Ma⚛️ hep-ph

New Bounds on Heavy QCD Axions from Big Bang Nucleosynthesis

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.

Tae Hyun Jung, Takemichi Okui, Kohsaku Tobioka, Jiabao WangWed, 11 Ma⚛️ hep-ph

Extracting the speed of sound of QCD from transverse momentum fluctuations

This paper extracts the speed of sound in the quark-gluon plasma from ATLAS transverse momentum fluctuation data in ultra-central Pb+Pb collisions by correcting for detection biases and hadronization noise, yielding a result of $c_s/c=0.496\pm 0.008$ that aligns perfectly with first-principles lattice QCD calculations.

Mubarak Alqahtani, Tribhuban Parida, Jean-Yves OllitraultWed, 11 Ma⚛️ hep-ph

JLab and J-PARC for the J/{\ensuremath{\psi}} Production at the Threshold

This paper synthesizes new threshold measurements of $J/\psi$ production from JLab experiments (007 and CLAS12) with previous GlueX data to confirm a consistent phenomenological determination of the $J/\psi$ -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.

Igor I. Strakovsky (GWU), Jung Keun Ahn (Korea U.), William J. Briscoe (GWU), Misha G. Ryskin (PNPI), Axel Schmid (GWU)Wed, 11 Ma⚛️ hep-ph

Sensitivity of Jet Observables to Molière Scattering Off Quasiparticles in Quark-Gluon Plasma

This paper presents a full calculation of Molière scattering between jet partons and QGP quasiparticles implemented within the Hybrid Model, demonstrating that photon-tagged jets serve as a sensitive probe for detecting distinctive experimental signatures of these hard scatterings through their impact on jet substructure observables like the Soft Drop angle and jet girth.

Zachary Hulcher, Arjun Srinivasan Kudinoor, Daniel Pablos, Krishna RajagopalWed, 11 Ma⚛️ hep-ph

Direct Neutron Reactions in Storage Rings Utilizing a Supercompact Cyclotron Neutron Target

This paper proposes a novel high-density free-neutron target system, integrating a supercompact cyclotron with advanced moderation and cryogenic technologies, to enable high-luminosity neutron capture measurements on short-lived radioactive ions in storage rings for nuclear astrophysics research.

Ariel Tarifeño-Saldivia, César Domingo-Pardo, Iris Dillmann, Yuri A. LitvinovTue, 10 Ma🔬 physics

Characterization of the Low Energy Excess using a NUCLEUS $Al_2O_3$ detector

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.

Radiative corrections to the nucleon isovector $g_V$ and $g_A$

This paper calculates enhanced electroweak, QCD, and QED radiative corrections to the nucleon coupling constants $g_V$ and $g_A$ , providing updated relations between lattice-QCD and physical values that yield a total correction of approximately 3.5% to 5.6% and predict a physical axial charge $g_A$ of 1.265(26) or 1.240(9) depending on the input methodology.

Oleksandr Tomalak, Yi-Bo YangTue, 10 Ma⚛️ hep-ph

Physics-Informed Global Extraction of the Universal Small- $x$ Dipole Amplitude

This paper presents a physics-informed neural network approach to extract a universal small- $x$ dipole scattering amplitude directly from global DIS and photoproduction data without rigid parametric assumptions, successfully resolving the long-standing tension between total and charm cross-section channels while providing a smooth, non-negative input for Color Glass Condensate phenomenology.

Si-Wei Dai, Fu-Peng Li, Long-Gang Pang, Guang-You Qin, Shu-Yi Wei, Han-Zhong Zhang, Wenbin ZhaoTue, 10 Ma⚛️ hep-ph

Production of high-spin $\omega_J/\rho_J$ ( $J=2,3,4,5$ ) mesons in $\pi^{-}p$ reactions

Using an effective Lagrangian approach calibrated to existing data, this study successfully reproduces the production cross sections of high-spin $\omega_3$ and $\rho_3$ mesons in $\pi^- p$ reactions and predicts measurable, forward-peaked production rates for their $J=2,4,5$ partners, suggesting their feasibility for observation in future meson-beam experiments.

Ting-Yan Li, Zi-Yue Bai, Xiang LiuThu, 12 Ma⚛️ nucl-ex

Electromagnetic tomography of radial flow in the quark-gluon plasma

This paper proposes a novel multimessenger framework that extracts the effective radial flow of the quark-gluon plasma by jointly analyzing thermal photon and dilepton spectra, establishing a measurable quantity that correlates with spacetime-averaged radial velocity and provides a concrete roadmap for probing early-time QGP dynamics at RHIC and the LHC.

Lipei Du, Ulrich HeinzThu, 12 Ma⚛️ nucl-ex

Finite-Size Scaling of Net-Proton Cumulants in Heavy-Ion Collisions: Remarks on the Interpretation of a Recent Analysis

This paper critically examines a recent analysis claiming evidence for a QCD critical end point via finite-size scaling of net-proton cumulants, highlighting methodological issues regarding acceptance windows, multiplicity scaling, and thermodynamic fields that must be addressed for a consistent interpretation.

Roy A. Lacey (Department of Chemistry, Stony Brook University, Stony Brook, NY, USA)Thu, 12 Ma⚛️ nucl-th

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