26-31 July 2021
Mexico City
Mexico/General timezone
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Contribution Parallel

Mexico City -
Meson Spectroscopy

Generalizing the Lellouch-Luscher formula to three-particle decays

Speakers

  • Prof. Stephen SHARPE

Primary authors

Co-authors

Abstract

We generalize the Lellouch-Lüscher formalism to decays to three degenerate scalar particles. The formalism allows a lattice calculation of the $K\to3\pi$ weak decay, the isospin-breaking $\eta \to 3 \pi$ QCD transition, and the electromagnetic $\gamma^*\to 3\pi$ amplitudes that enter the calculation of the hadronic vacuum polarization contribution to muonic $g − 2$.