nucl-ex

Determination of the Muon Lifetime in $^{76}$Se with the MONUMENT experiment

The MONUMENT collaboration determined the muon lifetime in $^{76}$Se with improved accuracy to be (135.1 $\pm$ 0.5) ns, a result that aligns with phenomenological calculations using unquenched axial-vector coupling and serves as a benchmark for neutrinoless double beta decay models.

Backward-angle electroproduction of $η'$ mesons off protons at $W=2.13~\text{GeV}$ and $Q^{2}=0.46~\left(\text{GeV}/c\right)^{2}$

This paper reports the first experimental measurement of backward-angle $η'$ meson electroproduction off protons at $W=2.13~\text{GeV}$ and $Q^{2}=0.46~(\text{GeV}/c)^{2}$, yielding a differential cross section significantly lower than real-photoproduction values and providing new constraints on nucleon resonance couplings within an isobar model framework.

The collectivity of transverse momentum fluctuations

This paper utilizes hydrodynamic modeling to demonstrate that the transverse momentum fluctuation observable $v_0(p_T)$ serves as a robust probe of radial flow and collectivity, revealing that its apparent sensitivity to transport coefficients is largely driven by changes in the mean transverse momentum and can be isolated through appropriate scaling.

Westcott $g$ Factors Extended to Arbitrary Neutron Energy Spectra

This paper presents an updated methodology and open-source software for calculating Westcott $g$ factors using ENDF/B-VIII.1 cross-section data across both Maxwellian and arbitrary non-Maxwellian neutron spectra, specifically addressing the needs of guided thermal and cold-neutron beams at facilities like the Budapest Research Reactor and FRM II.

Proton induced reactions on 118Sn target at energies up to 18 MeV

This study investigates proton-induced reactions on an enriched 118Sn target up to 18 MeV using the stacked-foil activation technique, reporting first-time cross-section measurements for specific channels and revealing discrepancies between experimental data and theoretical models regarding composite-particle emission.

Geometric bias and centrality dependence of jet quenching in high-energy nuclear collisions

Probing the neutron-skin thickness through $J/\psi$ photoproduction in ultra-peripheral collisions

This study demonstrates that the neutron-skin thickness in ultra-peripheral $^{208}\mathrm{Pb}+{}^{208}\mathrm{Pb}$ collisions significantly influences $J/\psi$ photoproduction by suppressing coherent cross sections at large momentum transfer while enhancing incoherent ones, thereby establishing the ratio of incoherent to coherent cross sections as a robust observable for constraining neutron-skin thickness and transverse gluon distributions.

Data-driven method to estimate contamination from light ion beam transmutation at colliders

This paper proposes a data-driven method that utilizes the distinct time dependence and smaller size of beam contaminants to define control regions for quantifying and mitigating the impact of light-ion beam transmutation on physics analyses at colliders like the LHC and RHIC.

Accessing nucleon transversity with one-point energy correlators

This paper proposes using the one-point energy correlator (OPEC) in transversely polarized proton-proton collisions as a novel, infrared-and-collinear safe method to probe the nucleon's transversity distribution with a clean angular asymmetry over a wider kinematic range than traditional hadron transverse momentum measurements.

Bayesian Constraints on Pre-Equilibrium Jet Quenching and Predictions for Oxygen Collisions

This paper employs a Bayesian analysis of a semi-analytic jet quenching framework coupled with hydrodynamics and pre-equilibrium energy loss to constrain early-time quenching mechanisms in large systems and predict significant jet and hadron suppression in future oxygen-oxygen collisions.