EWPD in the SMEFT to dimension eight

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We calculate the OH dagger H2/Lambda 4 corrections to LEP electroweak precision data using the geometric formulation of the Standard Model Effective Field Theory (SMEFT). We report our results in simple-to-use interpolation tables that allow the interpretation of this data set to dimension eight for the first time. We demonstrate the impact of these previously unknown terms in the case of a general analysis in the SMEFT, and also in the cases of two distinct models matched to dimension eight. Neglecting such dimension-eight corrections to LEP observables introduces a theoretical error in SMEFT studies. We report some preliminary studies defining such a theory error, explicitly demonstrating the effect of previously unknown dimension-eight SMEFT corrections on LEP observables.

Original languageEnglish
Article number76
JournalJournal of High Energy Physics
Volume2021
Issue number6
Number of pages42
ISSN1029-8479
DOIs
Publication statusPublished - 11 Jun 2021

    Research areas

  • Beyond Standard Model, Effective Field Theories, ELECTROWEAK PARAMETERS, RADIATIVE-CORRECTIONS, HILBERT SERIES, PHYSICS

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