探测在$\u221as=13$ TeV下Higgs+Jet产生中EFT方法的有效性
Probing the Validity of EFT Approaches in Higgs + Jet Production at $\sqrt{s}=13$ TeV
- Dr. Hari Singh Gour Vishwavidyalaya（德里·哈里·辛格·高尔大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究在13 TeV质子碰撞中，用MadGraph5_aMC@NLO比较标准模型与HEFT/SMEFT对Higgs+喷注产生的预测，发现低横动量区有效，高pT区失效，并定量给出EFT适用范围。
AI中文摘要：
在大型强子对撞机上，Higgs玻色子伴随喷注的产生是最重要的研究过程之一。它作为高能动力学的灵敏探针，为标准模型提供了强大的检验平台，同时也对可能的新物理效应具有敏感性。在本工作中，我们使用MadGraph5_aMC@NLO框架，对质心能量为13 TeV的质子-质子碰撞中Higgs+喷注产生过程进行了唯象学研究。我们比较了由完整圈诱导的标准模型预测与在HEFT和SMEFT框架内得到的预测。以Higgs横动量为探针，我们研究了归一化分布和比率谱以检验有效场论。我们的结果表明，在低横动量区域，有效方法成功再现了标准模型行为。然而，在高pT下出现了显著偏差，标志着有效近似的失效。这些发现强调了在基于EFT方法进行精密Higgs研究时仔细考虑运动学效应的重要性，并提供了其有效范围的定量估计。
英文摘要：
The production of a Higgs boson with a jet is one of the most important processes studied at the LHC. It serves as a sensitive probe of high-energy dynamics and provides a powerful testing ground for the Standard Model, while also offering sensitivity to possible new physics effects. In this work, we perform a phenomenological study of Higgs + jet production in proton-proton collisions at 13 TeV center of mass energy, using the MadGraph5_aMC@NLO framework. We compare predictions obtained from the full loop induced Standard Model with those derived within the HEFT and SMEFT frameworks. Taking the Higgs transverse momentum as a probe, we study normalized distributions and ratio spectra to test the effective field theories. Our results show that effective approaches successfully reproduce the Standard Model behavior in the low transverse-momentum region. However, sizable deviations emerge at high pT, signaling the breakdown of the effective approximation. These findings highlight the importance of carefully accounting for kinematic effects when applying EFT-based methods to precision Higgs studies and provide a quantitative estimate of their range of validity.
