Transverse-momentum pt correlations on (η, phi) from mean-pt fluctuations in Au–Au collisions at sqrt{s_{ m NN}} = 200 GeV
Transverse-momentum pt correlations on (η, phi) from mean-pt fluctuations in Au–Au collisions at sqrt{s_{
m NN}} = 200 GeV
复制标题
sqrt{s_{ m NN}} = 200 GeV 时 Au-Au 碰撞中平均 pt 波动对 (η, phi) 的横向动量 pt 相关性
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
E. al.
中科院分区：
文献类型：
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作者：
Star Collaboration;J. Adams;E. al.
We present first measurements of the pseudorapidity and azimuth (?, ) bin-size dependence of event-wise mean transverse-momentum pt fluctuations for Au?Au collisions at GeV. We invert that dependence to obtain pt autocorrelations on differences (??, ?) interpreted to represent velocity/temperature distributions on (?, ). The general form of the autocorrelations suggests that the basic correlation mechanism is parton fragmentation. The autocorrelations vary rapidly with collision centrality, which suggests that fragmentation is strongly modified by a dissipative medium in the more central Au?Au collisions relative to peripheral or p?p collisions.
