Higgs Boson Measurements and SMEFT Constraints with the CMS Experiment
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Higgs Boson Measurements and SMEFT Constraints with the CMS Experiment
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About this listen
The CMS Experiment has unveiled its most precise and comprehensive measurement of the Higgs boson to date, utilising LHC Run 2 data collected between 2016 and 2018. This significant legacy combination of Higgs boson studies confirms theories regarding the origin of mass in the Universe with a 5% precision for its production rate. Scientists achieved this by statistically combining measurements from all accessible Higgs boson decay channels and production modes. Furthermore, the experiment employed Simplified Template Cross Sections (STXS) to map the Higgs boson's behaviour across 32 distinct categories, and interpreted these findings using Standard Model Effective Field Theory (SMEFT) to search for new physics in a model-independent way, examining 43 different SMEFT interactions. While largely confirming the Standard Model, the results also show intriguing small deviations in high-momentum regions, which could hint at physics beyond the current understanding.
Links:
- https://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/HIG-21-018/index.html
- https://cms.cern/news/pieces-precision-building-higgs-bosons-clearest-portrait-date