发表机构
Istituto Nazionale di Fisica Nucleare - Sezione di Padova; Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova; Center for Cosmology, Particle Physics and Phenomenology (CP3), University of Louvain (UCLouvain); Departamento de Física and ICTEA, Universidad de Oviedo; European Organisation for Nuclear Research (CERN)（意大利国家核物理研究所帕多瓦分部; 帕多瓦大学伽利略·伽利雷物理与天文学系; 鲁汶宇宙学、粒子物理与现象学中心（CP3）/鲁汶大学; 奥维耶多大学物理系及ICTEA; 欧洲核子研究组织（CERN））
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究 FCC-ee 上顶夸克对产生对重新物理的灵敏度，利用基于矩阵元的判别量和完整六体运动学信息，在单算符拟合中可将新物理能标约束至 30 TeV，并与 HL-LHC 结合提升灵敏度。
AI 中文摘要
我们研究了 FCC-ee 上顶夸克对产生对重新物理的灵敏度，该新物理用标准模型有效场论参数化，并使用基于矩阵元的判别量进行分析。分析包括探测器重建效应（通过 IDEA 探测器概念的快速模拟获得）以及喷注味标记。我们考虑了在领头阶和具有两个共振顶夸克的图中所修正顶夸克电弱耦合或产生四费米子相互作用的维度六算符。利用完整的六体运动学信息来最大化对标准模型的区分能力。在 12 个判别量（每个考虑的算符对应一个）的空间中，每个维度使用两个分箱，提供了一种简单而稳健的方法来设置接近最优的多维约束。在单算符拟合中，对新物理能标的界限可达 30 TeV，而在全局多算符拟合中可达 5 TeV。与高亮度 LHC 对顶夸克算符的前景相结合，显示出互补的灵敏度，有助于消除近似简并。
英文摘要
We study the sensitivity of top-quark pair production at the FCC-ee to heavy new physics, parametrised in the Standard Model effective field theory, using discriminants based on matrix elements. The analysis includes detector reconstruction effects, obtained with a fast simulation of the IDEA detector concept, and jet flavour tagging. We consider dimension-six operators that modify the electroweak couplings of the top quark or generate four-fermion interactions, at leading order and in diagrams with two resonant top quarks. The full six-body kinematic information is employed to maximise the discrimination power against the Standard Model. Two bins per dimension in the space of 12 discriminants, one per operator considered, provide a simple and robust methodology to set nearly optimal multidimensional constraints. Bounds on the new physics scale can reach values up to 30 TeV in a single-operator fit and up to 5 TeV in a global multi-operator fit. A combination with High-Luminosity LHC prospects on top-quark operators shows complementary sensitivities which help lift approximate degeneracies.
Comments21 pages, 11 figures, 2 tables
