论文标题
$ \ sqrt {s _ {\ mathrm {nn}}} = 200 $ GEV的量化au+au碰撞中手性磁效应的量化
Quantification of the Chiral Magnetic Effect in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV
论文作者
论文摘要
多相传输模型AMPT和异常的粘性流体动力学模型AVFD用于评估最近用$ {r_ {ψ_2}（δs）（δs）} $ colleser in au+au colusions Au+au colusions在AU+AU colusions中测量的手性磁性驱动的电荷分离（$ΔS$） $ \ sqrt {s _ {\ mathrm {nn}}}} = 200 $ gev。实验和模拟$ {r_ {ψ_2}（δs）} $分布的比较表明，背景驱动的电荷分离不足以说明测量值。 AVFD模型计算在背景存在下明确说明了CME驱动的异常传输，这表明由$ p $ -ODD傅立叶偶极系数$ {a_1'} \约0.5 \％$在中央中央碰撞中量化的CME信号。对$δγ$相关器的类似评估表明，仅此信号的一小部分（$ f _ {\ rm cme} =δγ_{\ rm cme}/Δγ\％$）才能在相同的碰撞中与此相关器一起测量。还提出了RU+RU和ZR+ZR的同位碰撞中信号检测的相关预测。
The Multi-Phase Transport model, AMPT, and the Anomalous Viscous Fluid Dynamics model, AVFD, are used to assess a possible chiral-magnetically-driven charge separation ($ΔS$) recently measured with the ${R_{Ψ_2}(ΔS)}$ correlator in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV. The Comparison of the experimental and simulated ${R_{Ψ_2}(ΔS)}$ distributions indicates that background-driven charge separation is insufficient to account for the measurements. The AVFD model calculations, which explicitly account for CME-driven anomalous transport in the presence of background, indicate a CME signal quantified by the $P$-odd Fourier dipole coefficient ${a_1'}\approx 0.5\%$ in mid-central collisions. A similar evaluation for the $Δγ$ correlator suggests that only a small fraction of this signal ($f_{\rm CME}=Δγ_{\rm CME}/Δγ\approx 25\%$) is measurable with this correlator in the same collisions. The related prediction for signal detection in isobaric collisions of Ru+Ru and Zr+Zr are also presented.
