发表机构
School of Physics, University College Dublin; Université Paris-Saclay, CNRS, IJCLab; Warsaw University of Technology（都柏林大学学院物理学院; 巴黎萨克雷大学、法国国家科学研究中心、IJCLab; 华沙理工大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究评估EIC早期运行阶段ep、eA碰撞中重夸克相关电产生的前景，估算相关截面、事例产额与核修正比，为EIC相关研究提供部分子层面的基线参考。
AI 中文摘要
我们评估了电子离子对撞机（EIC）早期运行阶段，电子-质子（ep）碰撞中 inclusive 重夸克对电产生、电子-原子核（eA）碰撞中 inclusive 重夸克对电产生，以及ep碰撞中双粲夸克对（D⁀D⁰和D⁰D⁰）电产生的前景。基于EIC预期的束流能量和亮度，我们估算了光子虚度Q²、重夸克横向动量和快度的总截面与微分分布。该分析评估了不同Q²值范围内的不同Bjorken-x（x_Bj）区间，根据早期科学计划的预期积分亮度估算了预期事例产额，表明在中等和大x_Bj下，统计精度相比此前HERA测量有显著提升。对于电子-原子核碰撞，我们利用核部分子分布函数在共线因子化框架内计算了核修正比R^{eA}，并确定了EIC早期数据可探测到遮蔽效应、反遮蔽效应和类EMC抑制的运动学区域。这些结果旨在作为部分子层面的基线，为EIC的可行性研究提供支撑，并为未来更高阶的理论与实验研究提供参考。
英文摘要
We assess the prospects for inclusive heavy-quark-pair electroproduction in electron-proton ($ep$) and electron-nucleus ($e$A) collisions, alongside double-charm-pair ($D^0 \bar{D}^0$ and $D^0D^0$) electroproduction in $ep$ collisions, during the early operational phase of the Electron-Ion Collider (EIC). Based on the anticipated beam energies and luminosities of the EIC, we estimate the total cross sections and differential distributions for photon virtuality $Q^2$, heavy-quark transverse momentum, and rapidity. This analysis evaluates different Bjorken-$x$ ($x_{\rm Bj}$) intervals across a range of $Q^2$ values. Expected event yields are estimated from the projected integrated luminosities of the early science programme, demonstrating the substantial improvement in statistical precision over previous HERA measurements at moderate and large $x_{\rm Bj}$. For electron--nucleus collisions, we compute the nuclear modification ratio $R^{e\text{A}}$ within collinear factorisation using nuclear parton distribution functions, and identify the kinematic regimes in which shadowing, anti-shadowing, and EMC-like suppression are accessible with early EIC data. These results are intended to serve as a parton-level baseline to support feasibility studies and to provide a reference for future higher-order theoretical and experimental investigations at the EIC.
Comments13 pages, 17 figures, added new references
