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Title: Boosted Higgs Boson: A Gateway to New Physics
高动量希格斯物理：从精密测量到新物理探测
Abstract:
The Higgs boson, the cornerstone of the Standard Model, was discovered in 2012 at the Large Hadron Collider (LHC), marking a groundbreaking milestone in high-energy physics. Yet, critical questions—such as the origin of electroweak symmetry breaking and the mass hierarchy—remain unanswered. Precision measurements of the Higgs boson and its interactions, especially at high energies, offer one of the most promising pathways to uncover new physics at the LHC.
The most favored Higgs boson decay to a bottom-antibottom quark pair ($H \to b\bar{b}$) is emerging as a key channel for studying Higgs bosons produced with large momentum, where the decay products are reconstructed as a single, large-radius jet. Historically, hadronic final states have faced significant challenges due to contamination from QCD processes, but advancements in jet substructure and tagging techniques have made these analyses viable in the boosted topology. In this talk, I will present the first measurement of Higgs production in association with a vector boson in the fully hadronic ($qqb\bar{b}$) final state.
Looking ahead, I will discuss opportunities to improve measurements of highly energetic Higgs bosons and explore the physics potential of the High Luminosity LHC, the ATLAS detector upgrade, and future collider projects. These advancements will deepen our understanding of Higgs boson properties and their implications for physics beyond the Standard Model, paving the way for discoveries in the years to come.
中文摘要：
希格斯玻色子的发现完善了标准模型的基本框架，但暗物质、物质—反物质不对称等一系列根本问题表明，标准模型仍不是对自然界的最终描述。由于希格斯粒子与电弱对称性破缺和质量起源密切相关，对其性质开展高精度测量被认为是寻找新物理的重要途径之一。近年来，随着大型强子对撞机积累更多数据，希格斯研究正逐步从“是否发现”转向“如何精密测量”，其中高动量区域的希格斯过程因对异常耦合和有效场论偏离具有更高灵敏度，正成为当前实验研究的前沿方向。
本报告将介绍高动量希格斯研究的物理动机、实验挑战以及相关最新进展。报告将结合 ATLAS 实验中的研究工作，重点讨论全强子末态下高动量 VH(H\to b\bar b) 过程的首次测量，以及喷注子结构、b 标记和机器学习方法在其中发挥的关键作用。最后，报告将讨论 HL-LHC 时代高亮度运行对实验探测器和分析方法提出的新要求，以及像素探测器升级对于未来希格斯和新物理研究的重要意义。
a short description about yourself:
郑智，斯坦福直线加速器国家实验室（SLAC）博士后，2015年学士毕业于武汉大学，2020年博士毕业于美国密歇根大学，2021年至今在斯坦福直线加速器国家实验室从事高能物理实验研究。长期参与大型强子对撞机 ATLAS 实验，主要研究方向为顶夸克物理，希格斯物理和硅像素探测器的升级与研发。
zoom link:
https://zoom.us/j/94891367191?pwd=qd3EPX1EUr3saIJ4ObgSrBvYaXAPIA.1
Password: 260420