PaperPanorama
FAQ

Nuclear Theory·nucl-th

Monday·March 14, 2022

9 papers—3 primary·6 cross-listed

All9Primary3Cross-lists6
  1. 01

    Accessing the in-medium effects on nucleon-nucleon elastic cross section with collective flows and nuclear stopping

    Pengcheng Li🇨🇳 · Yongjia Wang🇨🇳 · Qingfeng Li🇨🇳 · Hongfei Zhang🇨🇳

    A systematic study of the in-medium correction factor () on nucleon-nucleon elastic cross section is performed within the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) model. The effects of the beam energy dependence of on the directed, elliptic flow and nuclear stopping in Au+Au collisions with energy ranging from to GeV are explored. It is found that the directed, elliptic flow and nuclear stopping at relatively low energies are very sensitive to , and the sensitivity gradually weakens with increasing beam energy. The beam energy dependent in-medium correction factor is deduced from the comparison of the excitation functions of the directed, elliptic flow and nuclear stopping between the calculated results and the FOPI experimental data.

    nucl-thPLB(2022)·37 citations
  2. 02

    Cross sections of removal reactions populating weakly-bound residual nuclei

    J.A. Tostevin

    In many instances, single nucleon removal reactions from neutron-proton asymmetric projectile nuclei populate final states in the residual nuclei that are very weakly bound. Familiar examples include neutron removal reactions from neutron-rich Be and Be, the latter populating the well-known halo ground-state and excited-state of Be - both states less than 1 MeV from the first neutron-decay threshold. Numerous additional examples arise in reactions of asymmetric - and -shell nuclei. The importance of this weak residue binding upon calculated single-nucleon removal reaction cross sections is quantified by means of model calculations that neglect or include the dissociation degree of freedom of the residual nuclei. The calculated removal-reaction cross sections for two representative -shell projectiles indicate that an explicit treatment of these residue break-up effects is unnecessary and that the differences between the break-up and no break-up calculations are small provided a consistent description of the residue structure and density is used.

    nucl-thnucl-ex0 citations
  3. 03

    Collectivity in Ultra-Peripheral Pb+Pb Collisions at the Large Hadron Collider

    Wenbin Zhao🇺🇸 · Chun Shen🇺🇸 · Björn Schenke🇺🇸

    We present the first full (3+1)D dynamical simulations of ultra-peripheral Pb+Pb collisions at the Large Hadron Collider. Extrapolating from p+Pb collisions, we explore whether a quasi-real photon interacting with the lead nucleus in an ultra-peripheral collision can create a many-body system exhibiting fluid behavior. Assuming strong final-state interactions, we provide model results for charged hadron multiplicity, identified particle mean transverse momenta, and charged hadron anisotropic flow coefficients, and compare them with experimental data from the ALICE and ATLAS collaborations. The elliptic flow hierarchy between p+Pb and +Pb collisions is dominated by the difference in longitudinal flow decorrelations and reproduces the experimental data well. We have demonstrated that our theoretical framework provides a quantitative tool to study particle production and collectivity for all system sizes, ranging from central heavy-ion collisions to small asymmetric collision systems at the Relativistic Heavy-Ion Collider and the Large Hadron Collider and even at the future Electron-Ion Collider.

    nucl-thhep-phnucl-exPRL(2022)·48 citations

Affiliations

first authorsco-authorsvia INSPIRE