Studying Coulomb correction at EIC and EicC

Exclusive $π^0$ production at EIC of China within handbag approach

The exclusive $π^0$ electroproduction is analyzed within the handbag approach based on Generalized Parton Distributions (GPDs) factorization. We consider the leading-twist contribution together with the transversity effects. It is shown that the transversity, $H_T$ and $\bar E_T$ GPDs are essential in the description of $π^0$ cross section. Predictions for future Electron-Ion Collider of China (EicC) energy range are done. It is found that transversity dominance $σ_T\ggσ_L$, observed at low energies is valid up to EicC energy range.

从中国电子离子对撞机上的π⁰和η产生过程中提取横向GPD信息

Extraction of information on transversity GPDs from $π^0$ and $η$ production on EIC of China

本文研究利用中国电子离子对撞机上的π⁰和η硬赝标量介子产生数据，通过GPD因子化框架提取横向广义部分子分布的卷积函数，并给出典型能量下的产生预言。

Threshold Upsilon-meson Photoproduction at EIC and EicC

High-accuracy $Υ$-meson photoproduction data from EIC and EicC experiments will allow the measurement of the near-threshold total cross section of the reaction $γp\toΥp$, from which the absolute value of the $Υp$ scattering length, $|α_{Υp}|$, can be extracted using a Vector-Meson Dominance model. For this evaluation, we used $Υ$-meson photoproduction quasi-data from the QCD approach (the production amplitude can be factorized in terms of gluonic generalized parton distributions and the quarkonium distribution amplitude). A comparative analysis of $|α_{Υp}|$ with the recently determined scatte…

EicC上的粲夸克Sivers函数

Charm Sivers function at EicC

本文研究EicC上粲夸克Sivers函数的理论框架与测量可行性，通过小x物理中与自旋相关QCD odderon的联系及PythiaeRHIC模拟，论证EicC在探测Sivers函数和验证自旋相关odderon存在方面的独特优势。

EIC与EicC上C宇称偶夸克偶素的光生产生

Photoproduction of C-even quarkonia at EIC and EicC

本文在NRQCD框架下系统计算了EIC和EicC上C宇称偶重夸克偶素通过单光子交换的光生产生率，发现其与odderon机制量级相当，为未来实验判别主导机制提供依据。

The Sivers asymmetry in charged Kaon and $Λ$ hyperon produced SIDIS process at electron ion colliders

We investigate the single transverse-spin asymmetry with a $\sin (ϕ_h-ϕ_S)$ modulation in the charged Kaon produced and in $Λ$ hyperon produced SIDIS process within the theoretical framework of transverse momentum dependent (TMD) factorization at the next-to-leading-logarithmic order. The asymmetry is contributed by the convolution of Sivers function and the unpolarized fragmentation function $D_1$ for the produced hadron. The parametrization for the proton Qiu-Sterman function, which is closely related to the Sivers function, is adopted to numerically estimate the Sivers asymmetry at the kine…

未来电子-离子对撞机上的深度虚康普顿散射

Deeply Virtual Compton Scattering at Future Electron-Ion Colliders

本文通过模拟EicC和EIC上的DVCS过程，并参照HERMES方法比较模型与不对称性伪数据，给出了质子中上、下夸克总角动量的模型依赖约束。

双环阶下的深层虚拟π子产生产

Deeply virtual pion production through two-loop order

本文首次计算了在广义BJorken极限下，γ_L* p→π+ n和γ_L* p→π^0 p过程的次次leading order (NNLO) QCD辐射修正，这些修正显著提高了perturbative QCD预测与JLab数据的一致性，并研究了双环QCD修正对纵向DVπP横截面及某些基准动量下横单旋不对称性(TSSA)的影响。

关于超相对论重离子碰撞中不存在库仑效应对$e^+e^-$对产生的评论

Comment on the absence of Coulomb effects on $e^+e^-$ pair production in ultrarelativistic heavy-ion collisions

在最近的作品[Segev，韦尔斯;巴尔茨，麦克勒兰;艾希曼，莱因哈特，施拉姆，格雷纳]有人声称，库仑修正$e^+e^-$生产截面在相对论性重离子碰撞是缺席的。我们指出，这一说法是在明显的矛盾，一些众所周知的结果。我们在RHIC和LHC重离子对撞机的对产生截面中得到了大的库仑修正。

包含偶极子取向的Balitsky-Kovchegov方程的解

Solutions to the Balitsky-Kovchegov equation including the dipole orientation

本文首次在靶快度BK方程中引入完整碰撞参数依赖和偶极子取向，提出三种方案处理快度非局域性以抑制库仑尾，并通过计算质子F2结构函数和J/ψ衍射产生与HERA数据吻合，验证了该方法在小x微扰QCD唯象研究中的可行性。