论文标题
使用相对论的重离子碰撞对中子皮肤厚度和核变形的限制
Constraints on neutron skin thickness and nuclear deformations using relativistic heavy-ion collisions from STAR
论文作者
论文摘要
在这些程序中，我们使用Isobar $^{96} _ {44} $ ru+$+$+$^{96} _ {44} $ ru和$^{96} _ {40} _ {40} $ zr+zr+$ zr+$^{96} _ {406} $ $ \ sqrt {s _ {_ {\ rm nn}}}} = 200 $ gev by star detector。椭圆流$ v_ {2} $，三角形流$ v_ {3} $的质量统一比率的重大偏差，均值$ p _ {\ rm t} $ fluctuations $ \langleΔp_ {\ rm t} t} \ rangle^{2} $，以及不对称的累积$ {\ rm ac} _ {2} \ {3 \} $表示其四倍体和八块变形的差异很大。产生的强体多样性$ n _ {\ rm ch} $的异质体比率的显着偏差，平均横向动量$ \ langle p _ {\ rm t} \ rangle $，净电荷$ΔQ$ $ the uno nuculus的核心构造的净收费$ΔQ$ concy colk concy concly concly concly concly concly colk colle concly cone cone cone cone cone cone cone cone cone cone cone cone conty cone come cone cone nuce be nuce be nuce by nuce的效果均为RU。我们讨论如何从数据中提取中子皮肤厚度，对称能量斜率参数和变形参数。
In these proceedings, we present the measurements of neutron skin thickness and nuclear deformation using isobar $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr collisions at $\sqrt{s_{_{\rm NN}}}=200$ GeV by the STAR detector. The significant deviations from unity of the isobar ratios of elliptic flow $v_{2}$, triangular flow $v_{3}$, mean $p_{\rm T}$ fluctuations $\langleδp_{\rm T}^{2}\rangle/\langle p_{\rm T}\rangle^{2}$, and asymmetric cumulant ${\rm ac}_{2}\{3\}$ indicate large differences in their quadrupole and octuple deformations. The significant deviations of the isobar ratios of produced hadron multiplicity $N_{\rm ch}$, mean transverse momentum $\langle p_{\rm T}\rangle$, and net charge number $ΔQ$ indicate a halo-type neutron skin for the Zr nucleus, much thicker than for the Ru nucleus, consistent with nuclear structure calculations. We discuss how we extract the neutron skin thickness, the symmetry energy slope parameter, and deformation parameters from data.
