AI 中文总结
该研究分析了NLO QCD与EW修正对希格斯衰变六维SMEFT系数约束的影响，对比了ATLAS前期研究的参数化方案，发现第三代2费米子算符受修正影响最大，还探究了希格斯三线性耦合的灵敏度。
AI 中文摘要
本文研究了次领头阶（NLO）量子色动力学（QCD）和电弱（EW）修正对大型强子对撞机（LHC）希格斯耦合测量中六维标准模型有效场论（SMEFT）希格斯衰变预测的影响。这类高阶修正对高亮度大型强子对撞机（HL-LHC）预期的精确希格斯与电弱测量将愈发重要。研究将结果与采用ATLAS前期研究输入的SMEFT参数化方案对比，该方案针对各产生和衰变过程，在对应标准模型（SM）过程最低非零微扰QCD阶评估六维SMEFT贡献。SMEFT的NLO QCD/EW修正对希格斯衰变道的影响在涉及第三代的2费米子算符中最为显著，同时也探究了对希格斯三线性耦合的灵敏度。
英文摘要
This paper presents the impact of the inclusion of next-to-leading-order (NLO) QCD and electroweak (EW) corrections for dimension-6 Standard Model Effective Field Theory (SMEFT) predictions for the Higgs decays in Higgs couplings measurements at the Large Hadron Collider. Such higher-order corrections will be increasingly important for the precise Higgs and electroweak measurements expected at the High-Luminosity Large Hadron Collider (HL-LHC). The results are compared with a SMEFT parameterisation employing inputs from a previous ATLAS study, in which the dimension-6 SMEFT contributions are evaluated for each production and decay process at the lowest non-vanishing perturbative QCD order of the corresponding SM process. The effects of the SMEFT NLO QCD/EW contributions to the Higgs decay channels are largest for 2-fermion operators involving the third generation. The sensitivity to the Higgs tri-linear coupling is also explored.
