Using BHF-derived in-medium cross sections in the IBUU transport model, the paper shows that nuclear stopping and differential flow are sensitive to scattering-amplitude, density-of-states, and total-momentum effects, while n/p and transverse-flow-difference probes remain robust.
Probing in-medium nucleon-nucleon inelastic scattering cross section by using energetic n/p ratio
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abstract
Based on the Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model, the in-medium nucleon-nucleon inelastic scattering ( which is dominated by pion production at low and intermediate energies) is explored. It is found that the in-medium modification of nucleon-nucleon inelastic scatterings appears to reduce the neutron to proton ratio n/p at higher kinetic energies. Although the in-medium modification of nucleon-nucleon inelastic scatterings, as expected, affects the value of $\pi^-/\pi^+$ ratio, considering a series of undetermined properties of delta resonance and $\pi$ in medium, the energetic neutron to proton ratio n/p is more suitable to be used to probe the in-medium correction of nucleon-nucleon inelastic scatterings.
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In-medium effects of nucleon-nucleon cross sections in heavy-ion collisions
Using BHF-derived in-medium cross sections in the IBUU transport model, the paper shows that nuclear stopping and differential flow are sensitive to scattering-amplitude, density-of-states, and total-momentum effects, while n/p and transverse-flow-difference probes remain robust.