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arXiv 2106.02525nucl-thhep-phnucl-ex
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多重数涨落对系统熵标度的影响

Impact of Multiplicity Fluctuations on Entropy Scaling Across System Size

Patrick Carzon, Matthew D. Sievert, Jacquelyn Noronha-Hostler

摘要:

初始态是重离子碰撞中最大的不确定性之一。一个模型不可知的方法是在现象学的特伦托框架,约束参数使用贝叶斯分析。然而,色玻璃凝聚(CGC)有效理论预测的初始能量密度,位于最近的贝叶斯分析之外,部分原因是特伦托假设事件的多重性波动遵循$Γ$分布。我们比较了Trento首选的$\sqrt{T_{A}T_{B}}$缩放到CGC样的$T_{A}T_{B}$缩放加上对数正态波动的$AuAu$和$dAu$碰撞,并发现有显着的影响多重性分布和偏心率,这可能会影响提取的粘度在小系统。

英文摘要:

The initial state is one of the greatest uncertainties in heavy-ion collisions. A model-agnostic approach is taken in the phenomenological Trento framework which constrains parameters using Bayesian analysis. However, the color-glass condensate (CGC) effective theory predicts initial energy densities that lie outside the recent Bayesian analyses due, in part, to the assumption in Trento of event-by-event multiplicity fluctuations following a $Γ$ distribution. We compare the Trento-preferred $\sqrt{T_{A}T_{B}}$ scaling to CGC-like $T_{A}T_{B}$ scaling coupled with log-normal fluctuations in $AuAu$ and $dAu$ collisions and find there is a significant impact on the multiplicity distributions and on the eccentricities, which may affect the extraction of viscosity in small systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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