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首页> 外文期刊>Physical review, C >Forward-backward multiplicity correlations caused by centrality fluctuations in high-energy heavy-ion collisions
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Forward-backward multiplicity correlations caused by centrality fluctuations in high-energy heavy-ion collisions

机译:由高能重离子碰撞中的中心性波动引起的前后倒退的多重相关性

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摘要

We consider that most of the long-range forward-backward multiplicity (FB) correlations in high energy A-A collisions are caused by the centrality fluctuation, and this phenomenon interferes with the measurement of the dynamical correlations greatly. We investigate the relationship between FB correlation strength and centrality by a Monte Carlo simulation and a derivation which are tested by A MultiPhases Transport (AMPT) model in Au+Au collisions at root(NN)-N-S = 200 GeV. We compare the FB correlation strengths of AMPT model with the results of the derivation at root(NN)-N-S = 7.7 to 200 GeV. A comparison between the default AMPT model and string melting AMPT model with different partonic scattering sections is made. As a result, we consider that the FB correlation strengths may be dominated by the mixing of different centrality events, and the short-range correlation may be overwhelmed for the most central collisions.
机译:我们认为高能量A-A碰撞中的大多数远向后向后多样性(FB)相关性由中心波动引起,并且这种现象干扰了动态相关性的测量。 我们调查FB相关强度与蒙特卡罗模拟的关系,并通过Root(nn)-n-s = 200 gev的Au + Au碰撞中的多阶段传输(AMPT)模型测试的推导。 我们将AMPT模型的FB相关强度与root(nn)-n-s = 7.7至200 gev的衍生结果进行比较。 制作了默认的AMPT模型与不同零件散射部分的熔化AMPT模型之间的比较。 结果,我们认为FB相关强度可以通过不同中心事件的混合来支配,并且短距离相关可以淹没用于最中心的碰撞。

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