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arXiv 2207.13151hep-ph
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与顶夸克有关的重玻色子的产生和衰变

Production and decay of a heavy boson in association with top quarks

Malgorzata Worek

摘要:

我们简要地报告了非线性量子色动力学对$pp \to t\bar{t} B +X$过程的修正,其中$B$代表$H,\,W^\pm$或$Z$。计算中考虑了顶夸克和$W^\pm/Z$规范玻色子的双共振、单共振和非共振费曼图、干涉和有限宽度效应。数值结果显示在不同的截面水平的各种因子分解和重正化尺度设置和一些PDF集。与忽略高阶项的微扰展开和不同的参数化的PDF的主要理论不确定性进行了讨论。此外,我们比较了我们的完整的多轻子末态的$pp\to t\bar{t} B+X$的计算在窄宽度近似。

英文摘要:

We briefly report on NLO QCD corrections to the $pp \to t\bar{t} B +X$ process, where $B$ stands for $H,\,W^\pm$ or $Z$. In the calculation all double-, single and non-resonant Feynman diagrams, interferences and finite-width effects are included for the top quark and $W^\pm/Z$ gauge bosons. Numerical results are shown at the differential cross section level for various factorisation and renormalisation scale settings and a few PDF sets. The main theoretical uncertainties associated with neglected higher-order terms in the perturbative expansion and with different parametrisations of the PDFs are also discussed. Furthermore, we compare our complete predictions for $pp\to t\bar{t} B+X$ in multi-lepton final states to the calculation in the narrow-width approximation.

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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