4.4 Article

The CKM parameters in the SMEFT

期刊

JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 5, 页码 -

出版社

SPRINGER
DOI: 10.1007/JHEP05(2019)172

关键词

Beyond Standard Model; Effective Field Theories; Quark Masses and SM Parameters

资金

  1. European Commission's Horizon 2020 Programme under the Marie Sklodowska-Curie grant [690575, 674896, 692194]
  2. Fondazione Della Riccia
  3. MINECO [FPA2016-76005-C2-1-P]
  4. Maria de Maetzu program of ICCUB [MDM-2014-0367]
  5. Marie Sklodowska-Curie Individual Fellowship of the European Commission's Horizon 2020 Programme [745954]
  6. European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [700525]
  7. [2017 SGR 929]
  8. Marie Curie Actions (MSCA) [745954] Funding Source: Marie Curie Actions (MSCA)

向作者/读者索取更多资源

The extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix from flavour observables can be affected by physics beyond the Standard Model (SM). We provide a general roadmap to take this into account, which we apply to the case of the Standard Model Effective Field Theory (SMEFT). We choose a set of four input observables that determine the four Wolfenstein parameters, and discuss how the effects of dimension-six operators can be included in their definition. We provide numerical values and confidence intervals for the CKM parameters, and compare them with the results of CKM fits obtained in the SM context. Our approach allows one to perform general SMEFT analyses in a consistent fashion, independently of any assumptions about the way new physics affects flavour observables. We discuss a few examples illustrating how our approach can be implemented in practice.

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