Elliptic flow ($v_2$) measurements of inclusive charged hadrons at mid-rapidity ($|η| <$ 1.0) in Au+Au collisions at $E_{lab} = 35\mathrm{~A~GeV}$ using the Parton Hadron String Dynamics (PHSD) model are presented as a function of centrality, transverse momentum ($p_\mathrm{T}$) and pseudo-rapidity ($η$). The $v_2$ results are obtained using the $η$-sub event plane method with respect to event plane angle ($ψ_{2}$) and participant plane angle ($ψ_{2}^{PP}$). $p_\mathrm{T}$-integrated charged hadron $v_2$ shows a strong centrality dependence in Au+Au collisions at $E_{lab} = 35\mathrm{~A~GeV}$. The eccentricity scaled elliptic flow ($v_2/\varepsilon_2$) also shows centrality dependence. The higher values of $v_2/\varepsilon_2$ in central collisions suggest development of stronger collectivity. The measurements are compared with the results from Au+Au collisions at $\sqrt{s_{\mathrm{NN}}} = 7.7\mathrm{~GeV}$ published by the STAR experiment at RHIC. We also compare results of HSD and PHSD modes of the model to investigate contribution of hadronic and partonic phases of the medium on the measured $v_2$. The current results serve as a prediction of the collective behavior of the matter produced in baryon rich and moderate temperature conditions for the upcoming Compressed Baryonic Matter (CBM) experiment at the Facility for Antiproton and Ion Research (FAIR). These predictions are also useful for the interpretation of data measured at RHIC Beam Energy Scan (BES) program.
Measurement of the cross sections for inclusive electron scattering in the E12-14-012 experiment at Jefferson Lab
在Jefferson Lab Hall A进行的E12-14-012实验收集了不同目标在对应于束能量2.222 GeV和散射角15.54度的运动学下的包含性电子散射数据。在这里，我们提出了一个全面的分析所收集的数据，并比较双微分截面的电子，包括散射提取使用固体目标（铝，碳，钛）和封闭的氩气电池。的数据扩展到广泛的范围内的能量转移，准弹性相互作用，三角洲共振激发，和非弹性散射产生的贡献的截面。双微分截面的高精度（~3%）的所有目标在所涵盖的运动范围内。
Transverse Spin Structure of the Nucleon through Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic $(e,e^\prime π^\pm)$ Reaction at Jefferson Lab
杰斐逊实验室（JLab）12 GeV的能量升级提供了一个黄金机会，可以对质子和中子在价夸克区域的横向自旋和横向动量相关结构进行精确研究。在本文中，我们重点讨论了最近批准的中子实验，作为JLab计划的精度研究的一个例子。新实验将使用11和8.8 GeV电子束，在深度非弹性散射运动学中，从40 cm长的横向极化$^3$ He靶半包容性电产生带电π介子，对靶单自旋不对称性（SSA）进行精确测量。这个新的符合实验在大厅A将采用一个新提出的螺线管光谱仪（SoLID）。大接收谱仪和高偏振光度将通过方位角依赖性提供关于中子的Collins、Sivers和Pretzelocity不对称性的精确四维（$x$、$z$、$P_T$和$Q^2$）数据。实验室中2 $π$全方位角覆盖对于控制系统不确定性至关重要。从这个实验的结果，当结合质子柯林斯不对称性测量和柯林斯碎裂功能确定的e $^+$ e $^-$碰撞数据，将允许夸克味分离，以实现10%的准确度确定张量电荷的d夸克。提取的Sivers和pretzelocity不对称性将为理解夸克轨道角动量和核子自旋之间以及夸克自旋和核子自旋之间的相关性提供重要信息。
Single inclusive hadron and jet production in lepton-hadron scattering
Theory Center, Jefferson Lab（理论中心，杰斐逊实验室）；Department of Physics, William & Mary（威廉与玛丽学院物理系）；Department of Physics, Graduate School of Science, Tohoku University（东北大学理学研究科物理学专攻）；Faculty of Science and Technology, Seikei University（圣成大学理工学部）
