Constraining new physics through the $t\bar{t}$ spin density matrix Article Swipe

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Afiq Aizuddin Bin Anuar , Kelly Beernaert , C. Schwanenberger , A. Grohsjean , Gerrit Van Onsem ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.3204/pubdb-2018-01710

The negative results obtained by searches for heavy new resonances are excluding ever more of the potential phase space where they could be directly produced at the LHC, hinting that they might be out of reach given our current facilities. This in turn makes the Effective Field Theory (EFT) description increasingly attractive as a way to explore the physics beyond the Standard Model (SM). In this approach the focus is on precision measurements and constraints are set on the EFT operators in terms of deviations with respect to SM predictions. In this talk, the basics of the EFT approach and operators will be discussed, with an emphasis on those affecting the top pair production process and how are they constrained through a measurement of the top pair spin density matrix in the dileptonic channel by the CMS experiment.

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Bar (unit) Physics Matrix (chemical analysis) Theoretical physics Materials science Meteorology Composite material

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Type: article
Language: en
Landing Page: https://bib-pubdb1.desy.de/record/402152
PDF: http://bib-pubdb1.desy.de/record/402152
OA Status: green
OpenAlex ID: https://openalex.org/W2796569615

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OpenAlex ID: https://openalex.org/W2796569615

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DOI: https://doi.org/10.3204/pubdb-2018-01710

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Title: Constraining new physics through the $t\bar{t}$ spin density matrix

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Type: article

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Language: en

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Publication year: 2018

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Publication date: 2018-01-01

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Authors: Afiq Aizuddin Bin Anuar, Kelly Beernaert, C. Schwanenberger, A. Grohsjean, Gerrit Van Onsem

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Landing page: https://bib-pubdb1.desy.de/record/402152

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OA URL: https://bib-pubdb1.desy.de/record/402152

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Concepts: Bar (unit), Physics, Matrix (chemical analysis), Theoretical physics, Materials science, Meteorology, Composite material

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