论文标题
粒子生产和各向异性流来自$ \ sqrt {s_ {nn}} = 200 $ gev的cu+au碰撞的AMPT模型
Particle productions and anisotropic flows from the AMPT model for Cu+Au collisions at $\sqrt{s_{NN}}=200$ GeV
论文作者
论文摘要
我们使用多相传输（AMPT）模型的字符串熔化版本在$ \ sqrt {s_ {nn}} = 200 $ GEV上研究Cu+Au碰撞。鉴定出的载体的速度分布显示出对速度的不对称依赖性。此外，从AMPT模型中，椭圆形和三角形流动的PION，KAONS和质子合理地与最高$ P_ {T} \ SIM1 $ GEV $/C $的实验数据一致。然后，我们调查$ v_2 $和$ v_3 $的前进/向后不对称。我们发现，这些各向异性的流在Au-to的一侧比Cu-to的一侧更大，而在非常外围的碰撞中，不对称性往往会消失。我们还对带电颗粒的已鉴定的Hadron的横向动量光谱和纵向去相关进行了预测，其中发现不对称CU+AU碰撞中椭圆流的平均非相关性比AU+AU碰撞中的平均强度更强。
We use the string melting version of a multi-phase transport (AMPT) model to study Cu+Au collisions at $\sqrt{s_{NN}}=200$ GeV. The rapidity distributions of identified hadrons show asymmetric dependences on rapidity. In addition, elliptic and triangular flows at mid-rapidity from the AMPT model for pions, kaons, and protons agree reasonably with the experimental data up to $p_{T}\sim1$ GeV$/c$. We then investigate the forward/backward asymmetry of $v_2$ and $v_3$. We find that these anisotropic flows are larger on the Au-going side than the Cu-going side, while the asymmetry tends to go away in very peripheral collisions. We also make predictions on transverse momentum spectra of identified hadrons and longitudinal decorrelations of charged particles, where the average decorrelation of elliptic flow in asymmetric Cu+Au collisions is found to be stronger than that in Au+Au collisions.
