| A Comparison of Different Measures for Dynamical Event Mean Transverse Momentum Fluctuation |
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| 作者姓名： | 刘连寿 付菁华 |
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| 作者单位： | [1]InstituteofParticlePhysics,HuazhongNormalUniversity,Wuhan430079 [2]EngineeringPhysicsDepartment,TsinghuaUniversity,Beijing100084 |
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| 摘 要： | Various measures for the dynamical event mean transverse momentum fluctuation are compared with the real dynamical fluctuation using a Monte Carlo model. The variance calculated from the G-moments can reproduce the dynamical variance well, while those obtained by subtraction procedures are approximate measures for not very low multiplicity. Фpt, proposed by Gadzicki M and Mrowczynski S Z. Phys. C 54 (1992)127], can also serve as an approximate measure after being divided by the square root of mean multiplicity.
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| 关 键 词： | 横向动量波动 蒙特卡罗模型 相对论重离子碰撞 原子核物理 夸克-胶子等离子体 |
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