Azimuthal distributions of radial momentum and velocity in relativistic heavy ion collisions

Azimuthal distributions of radial （transverse） momentum, mean radial momentum, and mean radial velocity of final-state particles are suggested for relativistic heavy ion collisions. Using the AMPT transport model with string melting, the distributions of Au＋Au collisions at 200 GeV are presented and...

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Bibliographic Details
Published in:Chinese physics C 2012-05, Vol.36 (5), p.423-428, Article 423
Main Author: 里霖 李娜 吴元芳
Format: Article
Language:English
Subjects:
AMPT
Anisotropy
Atomic collisions
Collisions
Melting
Radial flow
Radial velocity
Strings
Transport
动量
各向异性
平均径向速度
方位角分布
末态粒子
相对论重离子碰撞
运输模式
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Summary:Azimuthal distributions of radial （transverse） momentum, mean radial momentum, and mean radial velocity of final-state particles are suggested for relativistic heavy ion collisions. Using the AMPT transport model with string melting, the distributions of Au＋Au collisions at 200 GeV are presented and studied. It is demonstrated that the distribution of total radial momentum is more sensitive to the anisotropic expansion, as the anisotropies of final-state particles and their associated transverse momentums are both counted in the measurement. The mean radial velocity distribution is compared with the radial flow velocity. The thermal motion contributes an isotropic constant to the mean radial velocity.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/5/007