胶子饱和导致的重离子碰撞中的重子停止和电荷沉积

Oscar Garcia-Montero, Sören Schlichting
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引用次数: 0

摘要

我们利用彩色玻璃凝聚态(CGC)有效场理论计算了高能重离子对撞中的重子和电荷沉积,其中前导阶电荷是通过价夸克与饱和胶子靶的多次散射沉积的。我们得出了一个简化的现象学公式来描述电荷沉积,并从中提取出碰撞能量和几何参数的相关性。我们提出了所谓重子停止参数$\alpha_B$的近似分析预测,它与从实验数据中提取的$\alpha_B$的最新状态显示出极好的一致性。通过计算碰撞能量范围($\sqrt{s_{\rm NN}}=62.4 -5020$ GeV)内的电荷沉积大气滞留率,使用 McDIPPER 框架进一步验证了这些结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Baryon stopping and charge deposition in heavy-ion collisions due to gluon saturation
We compute baryon and electric charge deposition in high-energy heavy-ion collisions using the Color Glass Condensate (CGC) Effective Field Theory, where at leading order charge is deposited through multiple scatterings of valence quarks with a saturated gluon target. A simplified phenomenological formula is derived to describe charge deposition, from which the parametrical dependence with collisional energy and geometry can be extracted. We present an approximate analytical prediction of the so-called baryon stopping parameter $\alpha_B$, which shows excellent agreement with the state-of-the art extractions of $\alpha_B$ from experimental data. These results are further validated using the McDIPPER framework, by computing charge deposition at midrapidity across a range of collision energies ($\sqrt{s_{\rm NN}}= 62.4 - 5020$ GeV).
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