Isospin symmetry is not exact and the corrections to the isosymmetric limit are, in general, at the percent level. For gold plated quantities, such as pseudoscalar meson masses or the kaon leptonic and semileptonic decay rates, these effects are of the same order of magnitude of the errors quoted in nowadays lattice calculations and cannot be neglected any longer. In this talk I discuss the methods that have been developed in the last few years to calculate isospin breaking corrections by starting from first principles lattice simulations. In particular, I discuss how to perform a combined QCD+QED lattice simulation and a renormalization prescription to be used in order to separate QCD from QED isospin breaking effects. A brief review of recent lattice results of isospin breaking effects on the hadron spectrum is also included.

Tantalo, N. (2013). Isospin Breaking Effects on the Lattice. POS PROCEEDINGS OF SCIENCE.

Isospin Breaking Effects on the Lattice

TANTALO, NAZZARIO
2013

Abstract

Isospin symmetry is not exact and the corrections to the isosymmetric limit are, in general, at the percent level. For gold plated quantities, such as pseudoscalar meson masses or the kaon leptonic and semileptonic decay rates, these effects are of the same order of magnitude of the errors quoted in nowadays lattice calculations and cannot be neglected any longer. In this talk I discuss the methods that have been developed in the last few years to calculate isospin breaking corrections by starting from first principles lattice simulations. In particular, I discuss how to perform a combined QCD+QED lattice simulation and a renormalization prescription to be used in order to separate QCD from QED isospin breaking effects. A brief review of recent lattice results of isospin breaking effects on the hadron spectrum is also included.
Pubblicato
Rilevanza internazionale
Articolo
Comitato scientifico
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
eng
Tale contributo rappresenta la versione scritta di una relazione da me tenuta in assemblea plenaria (Plenary Talk) di una delle più importanti conferenze di fisica teorica delle particelle elementari.
http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=187
Tantalo, N. (2013). Isospin Breaking Effects on the Lattice. POS PROCEEDINGS OF SCIENCE.
Tantalo, N
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/102675
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