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arXiv 1805.09342hep-phnucl-exnucl-th
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彩色玻璃凝聚体小系统碰撞中方位各向异性谐波的层次性

Hierarchy of azimuthal anisotropy harmonics in collisions of small systems from the Color Glass Condensate

Mark Mace, Vladimir V. Skokov, Prithwish Tribedy, Raju Venugopalan

摘要:

我们证明了在相对论重离子对撞机(RHIC)上由PHENIX合作组[arXiv:1805.02973]测量的质子、氘和氦-3离子离金核的超相对论碰撞中,两粒子方位傅立叶谐波$v_2$和$v_3$的惊人系统学在彩色玻璃凝聚体(CGC)有效场论中得到再现。这与[arXiv:1805.02973]中的说法相矛盾,即他们的数据排除了基于初始状态的解释。正如先前在[arXiv:1705.00745,arXiv:1706.06260,arXiv:1801.09704]中所讨论的那样,这种效应的潜在系统学是由于在精细($p_\perp \gtrapprox Q_S$)或较粗糙($p_\perp \lessapprox Q_S$)横向动量分辨率下,大小为$1/Q_S$的胶子域之间强颜色相关的不同结构引起的。在RHIC和大型强子对撞机的轻-重离子碰撞中,可以进一步检验这个框架的有效性极限。这种测量也为进一步探索杰斐逊实验室测量的惊人的大短程核相关的作用提供了新的机会。

英文摘要:

We demonstrate that the striking systematics of two-particle azimuthal Fourier harmonics $v_2$ and $v_3$ in ultrarelativistic collisions of protons, deuterons and helium-3 ions off gold nuclei measured by the PHENIX Collaboration [arXiv:1805.02973] at the Relativistic Heavy Ion Collider (RHIC) is reproduced in the Color Glass Condensate (CGC) effective field theory. This contradicts the claim in [arXiv:1805.02973] that their data rules out initial state based explanations. The underlying systematics of the effect, as discussed previously in [arXiv:1705.00745,arXiv:1706.06260,arXiv:1801.09704], arise from the differing structure of strong color correlations between gluon domains of size $1/Q_S$ at fine ($p_\perp \gtrapprox Q_S$) or coarser ($p_\perp \lessapprox Q_S$) transverse momentum resolution. Further tests of the limits of validity of this framework can be carried out in light-heavy ion collisions at both RHIC and the Large Hadron Collider. Such measurements also offer novel opportunities for further exploration of the role of the surprisingly large short-range nuclear correlations measured at Jefferson Lab.

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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