Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8189739 | Physics Letters B | 2013 | 5 Pages |
Abstract
Based on the improved isospin-dependent Boltzmann-Langevin model which incorporates the dynamical fluctuations, we study the Ï production in central heavy ion collisions at different incident energies from 250 to 1200AMeV. It is found that the Ï multiplicity is sensitive to the nuclear equation of state. At Ï subthreshold energy, the fluctuations have a larger effect on the Ï multiplicity. The Ïâ/Ï+ ratios as a probe of nuclear symmetry energy are calculated with different stiffness of symmetry energy. The results favor a supersoft symmetry energy of the potential term in comparison with the FOPI data, which supports the one obtained by the usual Boltzmann-Uehling-Uhlenbeck model.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Wen-Jie Xie, Jun Su, Long Zhu, Feng-Shou Zhang,