https://doi.org/10.1140/epja/s10050-024-01349-9
Regular Article – Theoretical Physics
Isospin-dependent in-medium nucleon-Delta elastic cross section
1
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
2
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, 100049, Beijing, China
3
School of Science, Huzhou University, 313000, Huzhou, China
b
lipch@zjhu.edu.cn
d
liqf@zjhu.edu.cn
Received:
4
December
2023
Accepted:
27
May
2024
Published online:
17
June
2024
In heavy-ion collisions at intermediate energies, the production and propagation of 
particles are crucial to understanding the nuclear equation of state and inferring the properties of nuclear matter at high densities. Based on the self-consistent relativistic Boltzmann-Uehling-Uhlenbeck (RBUU) transport theory, by introducing the isovector 
meson exchange into the effective Lagrangian and adopting the density-dependent coupling constants, the detailed expressions for isospin-dependent in-medium 
elastic cross sections 
have been calculated. The energy and density dependence of the isospin-related as well as the total contributions of 
, 
and meson fields are analyzed. It is found that the total has a sensitive center-of-mass energy dependence at lower energies while exhibiting a slight increase as the center-of-mass energy increases. The isospin effect between different isospin-separated channels weakens as the energy and/or density increases. The isospin effect on the density- and energy-dependent in-medium 
elastic cross sections is dominantly caused by the delicate balance of the isovector meson exchange.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
