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.
Nucleon effective mass in hot dense matter
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abstract
Nucleon effective masses are studied in the framework of the Brueckner-Hartree-Fock many-body approach at finite temperature. Self-consistent calculations using the Argonne $V_{18}$ interaction including microscopic three-body forces are reported for varying temperature and proton fraction up to several times the nuclear saturation density. Our calculations are based on the exact treatment of the center-of-mass momentum instead of the average-momentum approximation employed in previous works. We discuss in detail the effects of the temperature together with those of the three-body forces, the density, and the isospin asymmetry. We also provide an analytical fit of the effective mass taking these dependencies into account. The temperature effects on the cooling of neutron stars are briefly discussed based on the results for betastable matter.
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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.