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arXiv 2005.03016hep-phhep-ex
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在$\mathcal{O}(α_s^3)$与PDMATHAAB喷流有关的$\mathrm{Z}$玻色子产生的预测

Predictions for $\mathrm{Z}$-boson production in association with a $\mathrm{b}$-jet at $\mathcal{O}(α_s^3)$

R. Gauld, A. Gehrmann-De Ridder, E. W. N. Glover, A. Huss, I. Majer

摘要:

在微扰QCD的框架下,在$\mathcal{O}(α_s^3)$上对强子-强子碰撞中$\mathrm{Z}$ -玻色子和$\mathrm{b}$ -喷注的产生提供了精确的预言。为了获得这些预测,我们进行了第一次计算的强子散射过程中,涉及直接生产的香味喷流在下一个到下一个领先的顺序精度在无质量QCD,并扩展技术,也占有限重夸克质量效应的影响。的预测进行比较,CMS数据中获得的$\mathrm{pp}$碰撞在质量中心的能量为$8~\mathrm{TeV}$,这是最精确的数据从运行I的大型强子对撞机的这个过程中,其中一个很好的描述的数据实现。为了进行这种比较,我们对数据进行了展开,这克服了长期存在的问题,即喷气味的实验和理论定义是不相容的。

英文摘要:

Precise predictions are provided for the production of a $\mathrm{Z}$-boson and a $\mathrm{b}$-jet in hadron-hadron collisions within the framework of perturbative QCD, at $\mathcal{O}(α_s^3)$. To obtain these predictions we perform the first calculation of a hadronic scattering process involving the direct production of a flavoured-jet at next-to-next-to-leading order accuracy in massless QCD, and extend techniques to also account for the impact of finite heavy-quark mass effects. The predictions are compared to CMS data obtained in $\mathrm{pp}$ collisions at a centre-of-mass energy of $8~\mathrm{TeV}$, which are the most precise data from Run I of the LHC for this process, where a good description of the data is achieved. To allow this comparison we have performed an unfolding of the data, which overcomes the long-standing issue that the experimental and theoretical definitions of jet flavour are incompatible.

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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