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arXiv 2602.05348hep-ph
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电子-质子碰撞中$B_c$介子光产额的解析研究

Resolved photoproduction of the $B_c$ meson in electron-proton collisions

Hebei University(河北大学);Guangxi University(广西大学)

Na Cai, Xi-Jie Zhan, Tai-Fu Feng

AI总结:

本文基于非相对论量子色动力学框架,系统研究了电子-质子碰撞中$B_c$介子的产额,考虑了直接通道和解析贡献,发现直接通道主导,但解析通道在低横动量区域有显著修正。

摘要:

本文基于非相对论量子色动力学框架,系统研究了电子-质子碰撞中$B_c$介子的产额,考虑了直接通道和解析贡献,发现直接通道主导,但解析通道在低横动量区域有显著修正。

英文摘要:

We present a systematic study of $B_c$ meson photoproduction at electron--proton colliders within the framework of nonrelativistic QCD (NRQCD) factorization. In addition to the dominant direct channel $γ+g\to B_c+X$, we include resolved contributions initiated by $g+g$ and $q+\bar q (q=u,d,s)$ subprocesses. Total cross sections and transverse-momentum distributions are calculated for several collider configurations, including HERA, LHeC, FCC-$ep$, and EIC. The numerical results show that the direct $γ+g$ channel provides the leading contribution over the entire kinematic range. However, the resolved $g+g$ channel yields a non-negligible correction, reaching the level of $\mathcal{O}(10\%)$ in the low-$p_T$ region where most events are produced, and it becomes increasingly important at higher collision energies. The $q+\bar q$ channel is found to be numerically insignificant.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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