Impact Parameter Dependence of π-π+ Ratio in Probing the Nuclear Symmetry Energy Using Heavy-Ion Collisions
Joint Authors
Wei, Gao-Feng
He, Guo-Qiang
Cao, Xin-Wei
Lu, Yi-Xin
Source
Advances in High Energy Physics
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-02-03
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The impact parameter dependence of π-/π+ ratio is examined in heavy-ion collisions at 400 MeV/nucleon within a transport model.
It is shown that the sensitivity of π-/π+ ratio on symmetry energy shows a transition from central to peripheral collisions; that is, the stiffer symmetry energy leads to a larger π-/π+ ratio in peripheral collisions while the softer symmetry energy always leads this ratio to be larger in central collisions.
After checking the kinematic energy distribution of π-/π+ ratio, we found this transition of sensitivity of π-/π+ ratio to symmetry energy is mainly from less energetic pions; that is, the softer symmetry energy gets the less energetic pions to form a smaller π-/π+ ratio in peripheral collisions while these pions generate a larger π-/π+ ratio in central collisions.
Undoubtedly, the softer symmetry energy can also lead more energetic pions to form a larger π-/π+ ratio in peripheral collisions.
Nevertheless, considering that most of pions are insufficiently energetic at this beam energy, we therefore suggest the π-/π+ ratio as a probe of the high-density symmetry energy effective only in central at most to midcentral collisions, thereby avoiding the possible information of low-density symmetry energy carried in π-/π+ ratio from peripheral collisions.
American Psychological Association (APA)
Wei, Gao-Feng& He, Guo-Qiang& Cao, Xin-Wei& Lu, Yi-Xin. 2016. Impact Parameter Dependence of π-π+ Ratio in Probing the Nuclear Symmetry Energy Using Heavy-Ion Collisions. Advances in High Energy Physics،Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1095285
Modern Language Association (MLA)
Wei, Gao-Feng…[et al.]. Impact Parameter Dependence of π-π+ Ratio in Probing the Nuclear Symmetry Energy Using Heavy-Ion Collisions. Advances in High Energy Physics No. 2016 (2016), pp.1-8.
https://search.emarefa.net/detail/BIM-1095285
American Medical Association (AMA)
Wei, Gao-Feng& He, Guo-Qiang& Cao, Xin-Wei& Lu, Yi-Xin. Impact Parameter Dependence of π-π+ Ratio in Probing the Nuclear Symmetry Energy Using Heavy-Ion Collisions. Advances in High Energy Physics. 2016. Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1095285
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1095285