有效场论中与矢量玻色子伴随产生的双希格斯玻色子的精确预言
Precise predictions for double Higgs production in association with a vector boson in Effective Field Theory
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中文总结 AI 辅助
该研究在SMEFT和HEFT框架下，计算了Vhh产生的NNLO QCD预言，给出13.6和14 TeV下的含不确定性的数值结果，发现W±hh的QCD修正与EFT依赖可因子化，Zhh则因胶子组分对EFT系数依赖更强。
中文摘要 AI 辅助
我们在新物理的有效场论描述下，给出了弱规范玻色子伴随产生的希格斯玻色子对（即pp→Vhh，其中V=W±、Z）的 next-to-next-to-leading order（NNLO）量子色动力学（QCD）预言。我们同时考虑了截断到六维的标准模型有效场论（SMEFT），以及手征展开领头阶的希格斯有效场论（HEFT）。该计算基于夸克诱导产生过程的因子化，即把其分解为离壳矢量玻色子的Drell-Yan产生及其随后衰变为Vhh，而在Zhh道中还补充了首次出现在NNLO QCD的圈诱导过程gg→Zhh的贡献。我们给出了质心系能量√s=13.6 TeV和14.0 TeV下的 inclusive 预言，包含能标、部分分布函数（PDF）以及强相互作用耦合常数α_s的不确定性，并将结果以数值系数的形式呈现，以便对所考虑范围内的任意有效场论参数进行快速评估。我们发现，对于W±hh产生，QCD修正与有效场论的依赖关系大体可因子化，导致K因子几乎平坦；相比之下，Zhh产生因包含胶子诱导的组分，对有效场论系数的依赖更强。
英文摘要
We present next-to-next-to-leading order (NNLO) QCD predictions for Higgs boson pair production in association with a weak gauge boson, $pp \to Vhh$ with $V=W^\pm,Z$, in effective field theory descriptions of new physics. We consider both the Standard Model Effective Field Theory (SMEFT), truncated at dimension six, and the Higgs Effective Field Theory (HEFT) at leading order in the chiral expansion. The calculation builds on the factorisation of the quark-induced production process into Drell-Yan production of an off-shell vector boson and its subsequent decay into $Vhh$, supplemented in the $Zhh$ channel by the loop-induced $gg \to Zhh$ contribution that first enters at NNLO QCD. We provide inclusive predictions at $\sqrt{s}=13.6$ and $14.0$ TeV, including scale, PDF, and $α_s$ uncertainties, and express the results in terms of numerical coefficients that allow fast evaluations for arbitrary EFT parameters in the considered ranges. We find that, for $W^\pm hh$ production, QCD corrections largely factorise from the EFT dependence, leading to almost flat $K$-factors. In contrast, $Zhh$ production shows a stronger dependence on the EFT coefficients because of the gluon-induced component.
