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arXiv 2009.08264hep-phhep-exnucl-exnucl-th
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HERA和EIC电子-质子碰撞中包含大P_T的光生J/psi

Large-P_T inclusive photoproduction of J/psi in electron-proton collisions at HERA and the EIC

Carlo Flore, Jean-Philippe Lansberg, Hua-Sheng Shao, Yelyzaveta Yedelkina

摘要:

本文研究了在交换光子为准实光子的极限下,轻子-强子对撞机上大横动量下的J/psi产生,也称为光生。我们的计算包括了前导-P_T前导-v次前导α_s修正。特别是,我们考虑的贡献,从J/psi加上另一个魅力夸克,采用第一次在夸克偶素光生变味数计划。我们还包括了QED通过离壳层光子引起的贡献,这在文献中一直被忽略,我们表明这是在EIC范围内的高P_T下的主要贡献。反过来,我们使用我们的J/psi+魅力的计算,以证明其在未来EIC的可观测性和EIC的灵敏度,以探测在高x质子的非微扰魅力内容。

英文摘要:

We study the inclusive J/psi production at large transverse momenta at lepton-hadron colliders in the limit when the exchange photon is quasi real, also referred to as photoproduction. Our computation includes the leading-P_T leading-v next-to-leading alpha_s corrections. In particular, we consider the contribution from J/psi plus another charm quark, by employing for the first time in quarkonium photoproduction the variable-flavour-number scheme. We also include a QED-induced contribution via an off-shell photon which remained ignored in the literature and which we show to be the leading contribution at high P_T within the reach of the EIC. In turn, we use our computation of J/psi+charm to demonstrate its observability at the future EIC and the EIC sensitivity to probe the non-perturbative charm content of the proton at high x.

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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