Fri·Oct 24, 2025Friday·October 24, 2025

1. 01*

   Probing the Three-dimension Emission Source and Neutron Skin via $\pi$-$\pi$ Correlations in Heavy-Ion Collisions

   Haojie Zhang🇨🇳 · Junhuai Xu🇨🇳 · Pengcheng Li🇨🇳 · Zhi Qin🇨🇳 · Dawei Si🇨🇳 · Yijie Wang🇨🇳 · Yongjia Wang🇨🇳 · Qingfeng Li🇨🇳 · Zhigang Xiao🇨🇳

   The Richardson-Lucy algorithm is applied to reconstruct the three-dimensional source function of identical pions from their two-particle correlation functions. The algorithm's performance is first evaluated through simulations with Gaussian-type initial source functions. Its imaging quality and robustness are further demonstrated with experimental data from Au+Au collisions at 1.23 A GeV, collected by the HADES Collaboration. Additionally, using UrQMD simulations of Pb+Pb collisions at 1.5 A GeV, we show that the deblurred source functions exhibit sensitivity to the initial neutron skin thickness of the colliding nuclei. This highlights the potential of the Richardson-Lucy algorithm as a tool for probing the neutron density distribution in heavy nuclei.

   nucl-exnucl-thPRC(2026)·4 citations
2. 02*

   Computing nuclear response functions with time-dependent coupled-cluster theory

   Francesca Bonaiti🇺🇸 · Cody Balos🇺🇸 · Kyle Godbey🇺🇸 · Gaute Hagen🇺🇸 · Thomas Papenbrock🇺🇸 · Carol S. Woodward🇺🇸

   We compute nuclear response functions by solving the time-dependent A-body Schrödinger equation, recording the time-dependent transition moment and extracting spectral information via Fourier transforms. The solution of the time-dependent many-body problem accounts for correlations on top of the mean field by taking advantage of a time-dependent formulation of coupled-cluster theory. As a validation, we focus on electric dipole transitions in ${}^4$He and ${}^{16}$O and compare moments of the response function distribution to the results of an equivalent static framework, finding negligible discrepancies. We investigate how proton and neutron densities evolve in time, and we see the traditional picture of soft and giant dipole resonances as collective oscillations of protons and neutrons emerging from our calculations in ${}^{16}$O and ${}^{24}$O. This method also allows us to investigate the behavior of the nucleus in the presence of a strong electric field. In that regime, the behavior of the system becomes chaotic. Qualitatively, the spectral information obtained in this limit is in line with previous time-dependent mean-field results.

   ↳ nucl-thnucl-exPRC(2026)·4 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.