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arXiv 0904.2069hep-ph
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QED对在Tevatron和LHC生产J/Xe +c \bar{c} +X的贡献

QED contribution to the production of J/ψ+c\bar{c}+X at the Tevatron and LHC

Zhi-Guo He, Rong Li, Jian-Xiong Wang

摘要:

在非相对论QCD框架下,计算了Tevatron和LHC上pp(\bar{p})\to J/J +c \bar{c}色单重过程中α^{2}α_{s}^{2}阶QED对J/J产生的贡献.同时考虑了α^{2}α_{s}^{2} QED和α_{s}^{4} QCD之间干涉的贡献。在强子对撞机实验中,与粲夸克对相关的J/π产生可能是一个可测量的信号。我们的计算表明,在p_{t} =50(100)GeV的Tevatron(LHC)中,通过引入QED的贡献,p_{t}分布增强了1.5(1.9)倍。另外,随着p_{t}的增大,J/J的偏振态由全区域的非偏振态逐渐转变为横向增强的偏振态。

英文摘要:

We calculate α^{2}α_{s}^{2} order QED contribution to J/ψproduction in pp(\bar{p})\to J/ψ+c\bar{c} color-singlet process at the Tevatron and LHC in the framework of non-relativistic QCD. The contribution of the interference between the α^{2}α_{s}^{2} QED and α_{s}^{4} QCD is also taken into account. The J/ψproduction associated with a charm quark pair could be a measurable signal at hadron collider experiment. Our calculations show that by including the QED contribution, the p_{t} distribution is enhanced by a factor of 1.5 (1.9) at the Tevatron (LHC) at p_{t}=50 (100) GeV. In addition, the polarization of J/ψturns from unpolarized in all region to increasingly transverse when p_{t} becomes larger.

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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