Pion production in a transport model based on mean fields from chiral effective field theory
Abstract
We develop a Boltzmann-Uehling-Uhlenbeck (BUU) transport model based on the Skχm* energy density functional, which is constructed from fitting the nuclear equation of state and nucleon effective masses in asymmetric nuclear matter predicted by the two- and three-body chiral interactions as well as the binding energies of finite nuclei. This new χBUU transport model is then used to study how baryon mean-field potentials affect the kinematics of a scattering or decay process and the equilibrium properties of a hot N–Δ–π system in a box with periodic boundary conditions. We find that the inclusion of mean-field potentials in the energy conservation condition for scattering and decay processes is necessary to maintain the equilibrium numbers of N,Δ, and π. Although the baryon mean-field potentials have significant effects on the total Δ and π numbers, they only slightly affect the ratio of effective negatively to positively charged pions. We also study pion production in central 197Au + 197Au collisions at the incident energy of E/A = 400 MeV and compare the results with the experimental data from the Four Pi (FOPI) Collaboration at the Gesellschaft für Schwerionenforschung mbH (GSI) in Germany. We find that our model can well describe the experimental results andmore »
- Authors:
-
- Texas A & M Univ., College Station, TX (United States); Sun Yat-Sen Univ., Zunhai (China)
- Texas A & M Univ., College Station, TX (United States)
- Publication Date:
- Research Org.:
- Texas A & M Univ., College Station, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1612270
- Alternate Identifier(s):
- OSTI ID: 1492144
- Grant/Contract Number:
- SC0015266
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 5; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics; Low & intermediate energy heavy-ion reactions; Nuclear density functional theory; Nuclear reactions
Citation Formats
Zhang, Zhen, and Ko, Che Ming. Pion production in a transport model based on mean fields from chiral effective field theory. United States: N. p., 2018.
Web. doi:10.1103/physrevc.98.054614.
Zhang, Zhen, & Ko, Che Ming. Pion production in a transport model based on mean fields from chiral effective field theory. United States. https://doi.org/10.1103/physrevc.98.054614
Zhang, Zhen, and Ko, Che Ming. Mon .
"Pion production in a transport model based on mean fields from chiral effective field theory". United States. https://doi.org/10.1103/physrevc.98.054614. https://www.osti.gov/servlets/purl/1612270.
@article{osti_1612270,
title = {Pion production in a transport model based on mean fields from chiral effective field theory},
author = {Zhang, Zhen and Ko, Che Ming},
abstractNote = {We develop a Boltzmann-Uehling-Uhlenbeck (BUU) transport model based on the Skχm* energy density functional, which is constructed from fitting the nuclear equation of state and nucleon effective masses in asymmetric nuclear matter predicted by the two- and three-body chiral interactions as well as the binding energies of finite nuclei. This new χBUU transport model is then used to study how baryon mean-field potentials affect the kinematics of a scattering or decay process and the equilibrium properties of a hot N–Δ–π system in a box with periodic boundary conditions. We find that the inclusion of mean-field potentials in the energy conservation condition for scattering and decay processes is necessary to maintain the equilibrium numbers of N,Δ, and π. Although the baryon mean-field potentials have significant effects on the total Δ and π numbers, they only slightly affect the ratio of effective negatively to positively charged pions. We also study pion production in central 197Au + 197Au collisions at the incident energy of E/A = 400 MeV and compare the results with the experimental data from the Four Pi (FOPI) Collaboration at the Gesellschaft für Schwerionenforschung mbH (GSI) in Germany. We find that our model can well describe the experimental results and the threshold effect due to baryon mean-field potentials does not affect much the charged pion ratio in this model. Here, we further make predictions on pion production for the ongoing experiments of 132Sn + 124Sn and 108Sn + 112Sn at the incident energy of E/A = 270 MeV by the SAMURAI Pion-Reconstruction and Ion-Tracker (SπRIT) Collaboration at the Institute of Physical and Chemical Research (RIKEN) in Japan.},
doi = {10.1103/physrevc.98.054614},
journal = {Physical Review C},
number = 5,
volume = 98,
place = {United States},
year = {Mon Nov 26 00:00:00 EST 2018},
month = {Mon Nov 26 00:00:00 EST 2018}
}
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