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arXiv 2002.05558hep-ph
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$gg\to ZZ$:低能区和高能区的分析双环结果

$gg\to ZZ$: analytic two-loop results for the low- and high-energy regions

Joshua Davies, Go Mishima, Matthias Steinhauser, David Wellmann

摘要:

考虑到虚顶夸克的贡献,我们在低能和高能极限下计算了对过程$gg\to ZZ$的次首阶虚双环修正。所有20个形状因子的分析结果,包括扩展项高达$1/m_t^{12}$和$m_t^{32}$。我们使用Padé近似程序来扩展高能展开的收敛半径,并将这种方法应用于有限虚拟次领先阶校正。

英文摘要:

We compute next-to-leading order virtual two-loop corrections to the process $gg\to ZZ$ in the low- and high-energy limits, considering the contributions with virtual top quarks. Analytic results for all 20 form factors are presented including expansion terms up to $1/m_t^{12}$ and $m_t^{32}$. We use a Padé approximation procedure to extend the radius of convergence of the high-energy expansion and apply this approach to the fini\ te virtual next-to-leading order corrections.

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