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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.