Pion Production in Rare Isotope Collisions
M.B. Tsang, J. Estee, H. Setiawan, W.G. Lynch, J. Barney, M.B. Chen,, G. Cerizza, P. Danielewicz, J. Hong, P. Morfouace, R. Shane, S., Tangwancharoen, K. Zhu, T. Isobe, M. Kurata-Nishimura, J. Lukasik, T., Murakami, and the S{\pi}RIT collaboration
TL;DR
This paper uses transport model simulations to analyze pion spectra in neutron-rich and neutron-deficient isotope collisions, aiming to constrain the symmetry energy at high densities.
Contribution
It introduces isospin-dependent mean field potentials in simulations to study pion production sensitivity to symmetry energy at supra-saturation densities.
Findings
Pion spectra are sensitive to the density dependence of symmetry energy.
Sensitivity increases with system isospin asymmetry.
Sensitivity decreases with higher incident energy.
Abstract
Pion energy spectra are presented for central collisions of neutron-rich 132Sn+124Sn and neutron-deficient 108Sn+112Sn systems using simulations with Boltzmann-Uehling-Uhlenbeck transport model. These calculations, which incorporate isospin-dependent mean field potentials for relevant baryons and mesons, display a sensitivity to the pion spectra that could allow significant constraints on the density dependence of the symmetry energy and its mean field potential at supra-saturation densities. The predicted sensitivity increases with the isospin asymmetry of the total system and decreases with incident energy.
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