Note on the power divergence in lattice calculations of ΔI=1/2 K→ππ amplitudes at MK=Mπ

Maarten Golterman*, Chi-Jen Lin, Elisabetta Pallante

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this Brief Report, we clarify a point concerning the power divergence in lattice calculations of Δ/=1/2 K→ππ decay amplitudes. There have been worries that this divergence might show up in the Minkowski amplitudes at MK=Mπ with all the mesons at rest. Here we demonstrate, via an explicit calculation in leading-order chiral perturbation theory, that the power divergence is absent at the above kinematic point, as predicted by CPS symmetry.

Original languageEnglish
Article number057503
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume69
Issue number5
DOIs
StatePublished - 1 Jan 2004

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