Observation of Influence of Nucleons＇ Motion on Kaons Collective Flow in Dense Medium

In order to extract the information of the momentum-dependent interaction of kaons under the extreme condition, the properties of the positively charged kaons produced in a heavy ion collision are studied via a simple model which has an invariable nucleon＇s velocity. Our special attention is focused...

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Published inChinese physics letters Vol. 27; no. 1; pp. 92 - 95
Main Author 邢永忠 郑玉明 王艳艳 张林 屈世显
Format Journal Article
LanguageEnglish
Published IOP Publishing 2010
Subjects
Charging
Collision dynamics
Computer simulation
Kaons
K介子
Mathematical models
Nucleons
Transport theory
粒子模型
速度分布
重介质
重离子碰撞
集体流
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/27/1/012501

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Abstract In order to extract the information of the momentum-dependent interaction of kaons under the extreme condition, the properties of the positively charged kaons produced in a heavy ion collision are studied via a simple model which has an invariable nucleon＇s velocity. Our special attention is focused on the observation of the dependence of the kaon＇s properties on the motion of nucleons in a hot and dense nuclear environment. Starting from two kinds of kaon quasiparticle models defined in transport theories for simulating heavy ion collisions, we calculate the effective mass and potential of the K＋＇s produced in the collisions and find that these properties not only depend closely on the velocity of nucleons but the dependence varies with kaon＇s quasiparticle model. It is clearly shown that the motion of nucleons reduces the momentum of K＋＇s at a given rapidity and thus weakens the rapidity distribution of K＋＇s directed flow in realistic nuclear collisions.
AbstractList In order to extract the information of the momentum-dependent interaction of kaons under the extreme condition, the properties of the positively charged kaons produced in a heavy ion collision are studied via a simple model which has an invariable nucleon's velocity. Our special attention is focused on the observation of the dependence of the kaon's properties on the motion of nucleons in a hot and dense nuclear environment. Starting from two kinds of kaon quasiparticle models defined in transport theories for simulating heavy ion collisions, we calculate the effective mass and potential of the K+ 's produced in the collisions and find that these properties not only depend closely on the velocity of nucleons but the dependence varies with kaon's quasiparticle model. It is clearly shown that the motion of nucleons reduces the momentum of K+ 's at a given rapidity and thus weakens the rapidity distribution of K+ 's directed flow in realistic nuclear collisions.
In order to extract the information of the momentum-dependent interaction of kaons under the extreme condition, the properties of the positively charged kaons produced in a heavy ion collision are studied via a simple model which has an invariable nucleon＇s velocity. Our special attention is focused on the observation of the dependence of the kaon＇s properties on the motion of nucleons in a hot and dense nuclear environment. Starting from two kinds of kaon quasiparticle models defined in transport theories for simulating heavy ion collisions, we calculate the effective mass and potential of the K＋＇s produced in the collisions and find that these properties not only depend closely on the velocity of nucleons but the dependence varies with kaon＇s quasiparticle model. It is clearly shown that the motion of nucleons reduces the momentum of K＋＇s at a given rapidity and thus weakens the rapidity distribution of K＋＇s directed flow in realistic nuclear collisions.
Author 邢永忠 郑玉明 王艳艳 张林 屈世显
AuthorAffiliation College of Physics and Information Technology, Shaanxi Normal University, Xi＇an 710062 Department of Physics, Tianshui Normal University, Tianshui 741000 China Institute of Atomic Energy, PO Box 275（18）, Beijing 102413
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SubjectTerms Charging
Collision dynamics
Computer simulation
Kaons
K介子
Mathematical models
Nucleons
Transport theory
粒子模型
速度分布
重介质
重离子碰撞
集体流
Title Observation of Influence of Nucleons＇ Motion on Kaons Collective Flow in Dense Medium
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