The anomalous Lagrangian in ChPT at NNLO

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Abstract

The anomalous Lagrangian in mesonic Chiral Perturbation Theory, of odd intrinsic parity, is determined to next-to-next-to-leading order thereby completing the order p8 Lagrangian. A schematic view of its construction with the MINIBAR package for Mathematica is presented and the final operator count is discussed for a general number of light quark flavours as well as for the physical cases N f = 2, 3. The number of operators in our explicit construction of the Lagrangian basis is consistent with the number derived using the Hilbert series in the literature.

Original languageEnglish
Title of host publicationProceedings of Science
Volume449
Publication statusPublished - 2024 Mar 21
Event2023 European Physical Society Conference on High Energy Physics, EPS-HEP 2023 - Hamburg, Germany
Duration: 2023 Aug 212023 Aug 25

Publication series

NameProceedings of Science
PublisherSissa Medialab srl
ISSN (Print)1824-8039

Conference

Conference2023 European Physical Society Conference on High Energy Physics, EPS-HEP 2023
Country/TerritoryGermany
CityHamburg
Period2023/08/212023/08/25

Subject classification (UKÄ)

  • Subatomic Physics

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