Energy dependence of pion in-medium effects on the π−/π+ ratio in heavy-ion collisions Academic Article uri icon

abstract

  • Within the framework of a thermal model with its parameters fitted to the results from an isospin-dependent Boltzmann-Uehling-Uhlenbeck transport model, we have studied the pion in-medium effect on the charged-pion ratio in heavy-ion collisions at various energies. We find that due to the cancellation between the effects from pion-nucleon s-wave and p-wave interactions in nuclear medium, the π-/π+ ratio generally decreases after including the pion in-medium effect. The effect is larger at lower collision energies as a result of narrower pion spectral functions at lower temperatures. © 2013 American Physical Society.

altmetric score

  • 0.5

author list (cited authors)

  • Xu, J., Chen, L., Ko, C. M., Li, B., & Ma, Y.

citation count

  • 30

publication date

  • June 2013