Effects of an induced electric field on the π-/π+ ratio in heavy-ion collisions

Gao Feng Wei, Shi Hai Dong, Xin Wei Cao, Yun Liang Zhang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Using an isospin- and momentum-dependent transport model, we examine the effects of an electric field induced by a variable magnetic field on the π-/π+ ratio in central to peripheral heavy-ion collisions at beam energies of 400 and 1500 MeV/nucleon. It is shown that while the induced electric field does not affect the total multiplicities of both π- and π+ mesons at both the lower beam energy of 400 MeV/nucleon and the higher beam energy of 1500 MeV/nucleon, it reduces (enhances) the emission of π-(π+) mesons in midrapidity, but enhances (reduces) the emission of π-(π+) mesons in forward and backward rapidities especially for the more peripheral collisions at the lower beam energy because of the rapidly transient variable magnetic field at more peripheral collisions and the longer reaction duration time at the lower beam energy. These findings indicate that the total π-/π+ ratio is still a precisely reliable probe of symmetry energy at both the lower and the higher beam energies, but one should consider the induced electric field when using the differential π-/π+ ratio to probe the symmetry energy especially for the lower beam energy and more peripheral collisions. Finally, the relative suppression factor based on the ratio of π-/π+ in different rapidities is proposed to be an effective probe of the induced electric field generated in heavy-ion collisions due to its maximizing effects of induced electric fields on the differential π-/π+ ratio but minimizing effects of some uncertainty factors in heavy-ion collisions.

Original languageEnglish
Article number014605
JournalPhysical Review C
Volume94
Issue number1
DOIs
StatePublished - 11 Jul 2016

Fingerprint

Dive into the research topics of 'Effects of an induced electric field on the π-/π+ ratio in heavy-ion collisions'. Together they form a unique fingerprint.

Cite this