Momentum dependence of the symmetry potential and its influence on nuclear reactions

Abstract

A Skyrme-type momentum-dependent nucleon-nucleon force distinguishing isospin effect is parameterized and further implemented in the Lanzhou Quantum Molecular Dynamics (LQMD) model for the first time, which leads to a splitting of nucleon effective mass in nuclear matter. Based on the isospin- and momentum-dependent transport model, we investigate the influence of momentum-dependent symmetry potential on several isospin-sensitive observables in heavy-ion collisions. It is found that symmetry potentials with and without the momentum dependence but corresponding to the same density dependence of the symmetry energy result in different distributions of the observables. The mid-rapidity neutron/proton ratios at high transverse momenta and the excitation functions of the total ${\pi }^{-}/{\pi }^{+}$ and $K^0/K^{+}$ yields are particularly sensitive to the momentum dependence of the symmetry potential.

12 pages, 5 figures

References in corpus (8)

• Isospin-dependent properties of asymmetric nuclear matter in relativistic mean-field models
• Dynamical analysis on heavy-ion fusion reactions near Coulomb barrier
• Constraining the high-density behavior of nuclear equation of state from strangeness production in heavy-ion collisions
• Dynamics of pion production in heavy-ion collisions around 1A GeV energies
• Pion Production in Heavy-ion Collisions in the 1 A GeV region
• Effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in heavy-ion collisions
• Fusion dynamics of symmetric systems near barrier energies
• Dynamics of strangeness production in heavy-ion collisions near threshold energies

Cited by in corpus (44)

• Nucleon Effective Masses in Neutron-Rich Matter
• Understanding transport simulations of heavy-ion collisions at 100 and 400 AMeV: Comparison of heavy ion transport codes under controlled conditions
• Comparison of heavy-ion transport simulations: Collision integral in a box
• Comparison of heavy-ion transport simulations: Collision integral with pions and $\Delta$ resonances in a box
• Comparison of Heavy-Ion Transport Simulations: Mean-field Dynamics in a Box
• Nuclear dynamics and particle production near threshold energies in heavy-ion collisions
• Transport approaches for the Description of Intermediate-Energy Heavy-Ion Collisions
• Nuclear in-medium effects and collective flows in heavy-ion collisions at intermediate energies
• Constraining simultaneously nuclear symmetry energy and neutron-proton effective mass splitting with nucleus giant resonances from a dynamical approach
• Progress of Quantum Molecular Dynamics model and its applications in Heavy Ion Collisions
• Thermal properties of asymmetric nuclear matter with an improved isospin- and momentum-dependent interaction
• Constraining the high-density nuclear symmetry energy with the transverse-momentum dependent elliptic flow
• Transverse emission of isospin ratios as a probe of high-density symmetry energy in isotopic nuclear reactions
• Effective mass splitting of neutron and proton and isospin emission in heavy-ion collisions
• Dynamics of strangeness and collective flows in heavy-ion collisions near threshold energies
• Revisit of the neutron/proton ratio puzzle in intermediate-energy heavy-ion collisions
• In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
• Formation and dynamics of exotic hypernuclei in heavy-ion collisions
• Influence of the treatment of initialization and mean-field potential on the neutron to proton yield ratios
• Isospin dynamics on neck fragmentation in isotopic nuclear reactions
• Nuclear in-medium and isospin effects on subthreshold kaon production in heavy-ion collisions
• Nuclear fragmentation and charge-exchange reactions induced by pions in the $\Delta$-resonance region
• Particle production in antiproton induced nuclear reactions
• Nuclear in-medium effects on $\eta$ dynamics in proton-nucleus collisions
• One-body Langevin dynamics in heavy-ion collisions at intermediate energies
• Preequilibrium particle emissions and in-medium effects on the pion production in heavy-ion collisions
• Hyperon Dynamics in Heavy-ion Collisions near threshold energy
• Production of fragments and hyperfragments in antiproton-nucleus collisions
• Isospin splitting of nucleon effective mass and symmetry energy in isotopic nuclear reactions
• Revisiting the isospin relaxation time in intermediate-energy heavy-ion collisions
• Strangeness and hypernuclear production in fragmentation reactions induced by antikaons
• Hyperon dynamics and production of multi-strangeness hypernuclei in heavy-ion collisions at 3A GeV
• Dynamics of light hypernuclei in collisions of ${}^{197}$Au+${}^{197}$Au at GeV energies
• Light fragment and neutron emission in high-energy proton induced spallation reactions
• Unexpected neutron/proton ratio and isospin effect in low-energy antiproton induced reactions
• High-density symmetry energy from subthreshold hyperon production in heavy-ion collisions
• Strangeness production and hypernuclear formation in proton and antiproton induced reactions
• Isospin effect in peripheral heavy-ion collisions at Fermi energies
• Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach
• Isovector giant dipole resonance mode with an improved propagation approach in the framework of EQMD model
• Antiproton production in heavy-ion collisions at subthreshold energies
• Weak value picture on quantum observables: gauge-invariant vector potentials
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions
• Basic quantities of the Equation of State in isospin asymmetric nuclear matter