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Nils HT

Nils Hermansson-Truedsson

Affiliated

Nils HT

Isospin-breaking corrections to light leptonic decays in lattice QCD+QED at the physical point

Author

  • Peter Boyle
  • Matteo Di Carlo
  • Felix Erben
  • Vera Gülpers
  • Maxwell T. Hansen
  • Tim Harris
  • Nils Hermansson-Truedsson
  • Raoul Hodgson
  • Andreas Jüttner
  • Fionn HÓgáin
  • Antonin Portelli
  • James Richings
  • Andrew Z.N. Yong
Show all

Summary, in English

We report on the physical-point RBC/UKQCD calculation of the leading isospin-breaking corrections to light-meson leptonic decays. This is highly relevant for future precision tests in the flavour physics sector, in particular the first-row unitarity of the Cabibbo-Kobayashi-Maskawa matrix containing the elements Vus and Vud. The simulations were performed using Domain-Wall fermions for 2 + 1 flavours, and with isospin-breaking effects included perturbatively in the path integral through order α and (mu - md)/ΛQCD. We use QEDL for the inclusion of electromagnetism, and discuss here the non-locality of this prescription which has significant impact on the infinite-volume extrapolation.

Department/s

  • Particle and nuclear physics

Publishing year

2023-04-06

Language

English

Publication/Series

Proceedings of Science

Volume

430

Document type

Conference paper

Topic

  • Subatomic Physics

Conference name

39th International Symposium on Lattice Field Theory, LATTICE 2022

Conference date

2022-08-08 - 2022-08-13

Conference place

Bonn, Germany

Status

Published

ISBN/ISSN/Other

  • ISSN: 1824-8039