Recent Standard Model Measurements at the CMS Experiment

by Ying An (DESY)

Tuesday 21 Apr 2026, 10:30 → 11:58 Asia/Shanghai

B105 (PKU Physics)

 

报告摘要：

 

The Standard Model (SM) of particle physics provides an extraordinarily successful description of fundamental particles and their interactions, yet it leaves several key questions unanswered, such as the nature of dark matter, the origin of neutrino masses, and the matter–antimatter asymmetry of the Universe. Precision measurements of SM processes at the Large Hadron Collider (LHC) play a crucial role in testing the internal consistency of the theory and in probing possible signs of new physics through deviations from its predictions.

In this talk, I will present an overview of recent highlight SM measurements performed by the CMS experiment at the LHC, using proton–proton collision data collected during Run 2. The results span a wide range of SM processes, including electroweak precision measurements, top-quark physics, and multi-boson production, with particular emphasis on diboson, triboson, and vector boson scattering processes. These measurements probe the SM over an enormous range of production cross sections and kinematic regimes, and rely on advanced reconstruction techniques, precise detector calibration, and sophisticated statistical analysis methods. I will briefly highlight how these measurements are performed and how they serve as essential benchmarks for searches for physics beyond the SM. Finally, I will shortly comment on prospects and opportunities with the increasing luminosity and energy of the LHC in Run 3 and beyond.

 

个人简介：

Ying An is an experimental particle physicist working within the CMS experiment at CERN. She received her Ph.D. in particle physics from Peking University, during which she carried out joint doctoral research at CERN and École Polytechnique supported by the China Scholarship Council (CSC). She recently completed a postdoctoral appointment at DESY in Hamburg.

Her research program focuses on precision Standard Model measurements at the LHC, with particular emphasis on electroweak and top-quark processes involving photons, including diboson, triboson, and vector boson scattering production. Through a series of CMS measurements published in leading journals such as Physical Review Letters, JHEP, and Physics Letters B, she has contributed to advancing precision tests of the Standard Model and establishing robust experimental benchmarks for new-physics searches.

In addition to physics analyses, she has also contributed to detector performance studies. As part of the CMS Luminosity Group, she participated in the testing, integration, and installation of the BCM1F luminosity detector, including leading the testing and data analysis framework development for spare modules. These efforts provided important technical support for luminosity measurements during Run 3.

Looking forward, her research interests include extending precision measurements with Run 3 data, developing new analysis strategies for rare electroweak and top-associated processes, and contributing to detector performance studies and upgrades for the High-Luminosity LHC.

 

报告摘要：

 

The Standard Model (SM) of particle physics provides an extraordinarily successful description of fundamental particles and their interactions, yet it leaves several key questions unanswered, such as the nature of dark matter, the origin of neutrino masses, and the matter–antimatter asymmetry of the Universe. Precision measurements of SM processes at the Large Hadron Collider (LHC) play a crucial role in testing the internal consistency of the theory and in probing possible signs of new physics through deviations from its predictions.

In this talk, I will present an overview of recent highlight SM measurements performed by the CMS experiment at the LHC, using proton–proton collision data collected during Run 2. The results span a wide range of SM processes, including electroweak precision measurements, top-quark physics, and multi-boson production, with particular emphasis on diboson, triboson, and vector boson scattering processes. These measurements probe the SM over an enormous range of production cross sections and kinematic regimes, and rely on advanced reconstruction techniques, precise detector calibration, and sophisticated statistical analysis methods. I will briefly highlight how these measurements are performed and how they serve as essential benchmarks for searches for physics beyond the SM. Finally, I will shortly comment on prospects and opportunities with the increasing luminosity and energy of the LHC in Run 3 and beyond.

 

个人简介：

Ying An is an experimental particle physicist working within the CMS experiment at CERN. She received her Ph.D. in particle physics from Peking University, during which she carried out joint doctoral research at CERN and École Polytechnique supported by the China Scholarship Council (CSC). She recently completed a postdoctoral appointment at DESY in Hamburg.

Her research program focuses on precision Standard Model measurements at the LHC, with particular emphasis on electroweak and top-quark processes involving photons, including diboson, triboson, and vector boson scattering production. Through a series of CMS measurements published in leading journals such as Physical Review Letters, JHEP, and Physics Letters B, she has contributed to advancing precision tests of the Standard Model and establishing robust experimental benchmarks for new-physics searches.

In addition to physics analyses, she has also contributed to detector performance studies. As part of the CMS Luminosity Group, she participated in the testing, integration, and installation of the BCM1F luminosity detector, including leading the testing and data analysis framework development for spare modules. These efforts provided important technical support for luminosity measurements during Run 3.

Looking forward, her research interests include extending precision measurements with Run 3 data, developing new analysis strategies for rare electroweak and top-associated processes, and contributing to detector performance studies and upgrades for the High-Luminosity LHC.