论文标题
$Δγ$相关器的缩放特性及其对重型离子碰撞中手性磁效应的影响
Scaling properties of the $Δγ$ correlator and their implication for detection of the chiral magnetic effect in heavy-ion collisions
论文作者
论文摘要
$δγ$相关器的缩放属性是根据异常粘性流体动力学（AVFD）模型推断出来的，用于研究$ p $+au，$ d $+d $+++++au+ru，ru+ru，zr+zr+au+au cultions $ p $+au中可能的手性磁性驱动（CME）电荷分离s _ {\ MathRm {nn}} = 200 $ GEV，在$ p $+pb（$ \ sqrt s _ {\ mathrm {nn}} = 5.02 $ tev）和pb+pb碰撞$ \ sqrt s _ {结果表明，商$Δγ/v_2 $的值与椭圆流系数$ v_2 $，$ p $+au，$ d $+au，$ p $+pb和pb+pb碰撞，比例为$ 1/{\ rm n_ {ch}} $一致地与背景驱动的偏移分离。相比之下，Ru+Ru，Zr+Zr和Au+Au碰撞的$δγ/V_2 $值显示出与存在背景以及CME驱动的贡献一致的规模违规。量化此CME驱动的组件表明，在中央碰撞中，可归因于CME的$Δγ/V_2 $的比例约为Au+Au的27 \％，对于RU+RU和ZR+ZR而言，大约有两个较小的因子，这显示出相似的幅度。
The scaling properties of the $Δγ$ correlator, inferred from the Anomalous Viscous Fluid Dynamics (AVFD) model, are used to investigate a possible chiral-magnetically-driven (CME) charge separation in $p$+Au, $d$+Au, Ru+Ru, Zr+Zr, and Au+Au collisions at $\sqrt s_{\mathrm{NN}}=200$ GeV, and in $p$+Pb ($\sqrt s_{\mathrm{NN}}=5.02$ TeV) and Pb+Pb collisions at $\sqrt s_{\mathrm{NN}}=5.02$ and $2.76$ TeV. The results indicate that the values of the quotient $Δγ/v_2$ with the elliptic flow coefficient $v_2$ for $p$+Au, $d$+Au, $p$+Pb, and Pb+Pb collisions, scale as $1/{\rm N_{ch}}$ consistent with background-driven charge separation. By contrast, the $Δγ/v_2$ values for Ru+Ru, Zr+Zr, and Au+Au collisions show scaling violations consistent with the presence of background plus a CME-driven contribution. Quantifying this CME-driven component indicates that in mid-central collisions, the fraction of the measured $Δγ/v_2$ attributable to the CME is approximately 27\% for Au+Au and roughly a factor of two smaller for Ru+Ru and Zr+Zr, which show similar magnitudes.
