原子核物理评论
原子覈物理評論
원자핵물리평론
Nuclear Physics Review
2013年
1期
26-31
,共6页
修正的Landau流体力学模型%带头粒子%高斯分布
脩正的Landau流體力學模型%帶頭粒子%高斯分佈
수정적Landau류체역학모형%대두입자%고사분포
revised Landau hydrodynamic model%leading particle%Gaussian distribution
采用修正的Landau流体力学模型,并考虑到带头粒子效应,对高能重离子碰撞末态带电粒子的赝快度分布进行了讨论.指出:带头粒子的快度分布应为高斯形式,其正规化常数为参与者数.研究表明:流体力学模型本身与BNL-RHIC-PHOBOS合作组在√sNN=200 GeV的Cu+Cu碰撞中的实验测量符合得不是很好,只有将参与者的贡献包括在内,实验结果才能得到很好的描述.
採用脩正的Landau流體力學模型,併攷慮到帶頭粒子效應,對高能重離子踫撞末態帶電粒子的贗快度分佈進行瞭討論.指齣:帶頭粒子的快度分佈應為高斯形式,其正規化常數為參與者數.研究錶明:流體力學模型本身與BNL-RHIC-PHOBOS閤作組在√sNN=200 GeV的Cu+Cu踫撞中的實驗測量符閤得不是很好,隻有將參與者的貢獻包括在內,實驗結果纔能得到很好的描述.
채용수정적Landau류체역학모형,병고필도대두입자효응,대고능중리자팽당말태대전입자적안쾌도분포진행료토론.지출:대두입자적쾌도분포응위고사형식,기정규화상수위삼여자수.연구표명:류체역학모형본신여BNL-RHIC-PHOBOS합작조재√sNN=200 GeV적Cu+Cu팽당중적실험측량부합득불시흔호,지유장삼여자적공헌포괄재내,실험결과재능득도흔호적묘술.
By using the revised Landau hydrodynamic model and taking into account the effect of leading particles, we discussed the pseudorapidity distributions of final charged particles in high energy heavy ion collisions. We argued that the rapidity distributions of leading particles have the Gaussian form with the normalization constant being equal to the number of participants. The investigations show that the results from the hydrodynamic model alone are not consistent with the experimental data carried out by BNL-RHIC-PHOBOS Collaboration in Cu+Cu collisions at √sNN=200 GeV. Only after the contributions from leading particles are included, can the experimental measurements be described well.
