Pion production and absorption in heavy-ion collisions

Abstract

Based on the isospin dependent transport model IBUU, the pion production and its absorption are thoroughly studied in the central collision of $Au+Au$ at a beam energy of 400 MeV/nucleon. It is found that the pions are firstly produced by the hard $\Delta$ decay at the average density around $1.75{\rho }_0$, whereas about 18\% of them are absorbed absolutely in the subsequent inelastic collisions. For the free pions observed, more than half of them have been scattered for one or more times before they are free from matter. And the more scattering numbers of pions, the higher the momentum they possess. These pions, due to longer time of their existence in high density nuclear matter, carry more information about the symmetry energy of the nuclear matter at high densities.

6 pages, 8 figures

References in corpus (4)

• Sensitivity of the transverse flow towards symmetry energy
• In-medium effects on particle production in heavy ion collisions
• Isospin Dynamics in Heavy Ion Collisions: EoS-sensitive Observables
• Constraining the Symmetry Energy: A Journey in the Isospin Physics from Coulomb Barrier to Deconfinement

Cited by in corpus (4)

• Quiescent luminosities of transiently accreting neutron stars with neutrino heating due to charged pion decay
• Probing $\Lambda$ potential via its $v_2$ flow in hypernuclei-induced reaction
• Isospin blocking and its effects in heavy-ion collisions
• In-medium effects of nucleon-nucleon cross sections in heavy-ion collisions