Journal
PHYSICA SCRIPTA
Volume 96, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1402-4896/ac19c9
Keywords
heavy-ion collisions; coalescence model; (anti)deuteron formation
Categories
Funding
- Development and Promotion of Science and Technology Talents Project (DPST) - Royal Thai Government Scholarship
- Suranaree University of Technology (SUT)
- Deutscher Akademischer Austausch Dienst (DAAD)
- Stiftung Polytechnische Gesellschaft Frankfurt am Main
- Helmholtz International Center for FAIR (HIC for FAIR) within the LOEWE program
- COST Action (THOR) [CA15213]
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The study investigates (anti)deuteron formation rates in heavy-ion collisions using a wave-function based coalescence model. The model explains the nucleon-antinucleon annihilations at lower beam energies by emitting nucleons from the entire fireball volume and antinucleons from a spherical shell near the surface. Comparison with experimental data and results from the UrQMD transport model show a qualitative trend in the geometric radii as a function of beam energy, with stronger annihilation observed at the central region of the fireball at lower energies.
We study (anti)deuteron formation rates in heavy-ion collisions in the framework of a wave-function based coalescence model. The main feature of our model is that nucleons are emitted from the whole spherically symmetric fireball volume, while antinucleons are emitted only from a spherical shell close to the surface. In this way, the model accounts for nucleon-antinucleon annihilations in the center of the reaction at lower beam energies. Comparison with experimental data on the coalescence parameter in the range root s(NN) = 4.7 - 200GeV allows us to extract radii of the respective source geometries. Our results are qualitatively supported by data from the UrQMD transport model which shows a comparable trend in the geometric radii as a function of beam energy. In line with our expectations, we find that at lower energies, the central region of the fireball experiences stronger annihilation than at higher energies.
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