论文标题
探索未来电子离子对撞机的$ J/ψ$生产机制
Exploring $J/ψ$ production mechanism at the future Electron-Ion Collider
论文作者
论文摘要
我们建议使用横向动量$ p_t $分布在未来电子离子对撞机（EIC）中的$ j/ψ$生产，以探索高能量碰撞中重Quarkonia的生产机制。我们将QCD和QED共线分解应用于高$ p_t $的$ c \ bar {c} $对的生产，而非相关QCD分解为对$ j/ψ$的强调。 We evaluate $J/ψ$ $p_T$-distribution at both leading and next-to-leading order in strong coupling, and show that production rates for various color-spin channels of a $c\bar{c}$ pair in electron-hadron collisions are very different from that in hadron-hadron collisions, which provides a strong discriminative power to determine various transition rates for the pair to become a $J/ψ$.我们预测，在电子 - 二重碰撞中产生的$ J/ψ$可能是未偏振的，并且生产是碰撞强子（或核）的GLUON分布的理想探针。我们发现，$ J/ψ$的产生由颜色octet通道主导，为探索EIC的大核中的Gluon培养基提供了出色的探针。
We propose to use transverse momentum $p_T$ distribution of $J/ψ$ production at the future Electron Ion Collider (EIC) to explore the production mechanism of heavy quarkonia in high energy collisions. We apply QCD and QED collinear factorization to the production of a $c\bar{c}$ pair at high $p_T$, and non-relativistic QCD factorization to the hadronization of the pair to a $J/ψ$. We evaluate $J/ψ$ $p_T$-distribution at both leading and next-to-leading order in strong coupling, and show that production rates for various color-spin channels of a $c\bar{c}$ pair in electron-hadron collisions are very different from that in hadron-hadron collisions, which provides a strong discriminative power to determine various transition rates for the pair to become a $J/ψ$. We predict that the $J/ψ$ produced in electron-hadron collisions is likely unpolarized, and the production is an ideal probe for gluon distribution of colliding hadron (or nucleus). We find that the $J/ψ$ production is dominated by the color-octet channel, providing an excellent probe to explore the gluon medium in large nuclei at the EIC.
