Three-particle Lellouch-Lüscher formalism in moving frames

[摘要] A manifestly relativistic-invariant Lellouch-Lüscher formalism for the decays into three identical particles with no two-to-three transitions is proposed. Similarly to [1], the formalism is based on the use of the non-relativistic effective Lagrangians. Manifest Lorentz invariance is guaranteed, as in [2], by choosing the quantization axis along the total four-momentum of the three-particle system. A systematic inclusion of the higher-order derivative couplings, as well as higher partial waves is addressed.

[发布日期] 2023-02-14

[关键词] Hadronic Matrix Elements and Weak Decays;Hadronic Spectroscopy;Structure and Interactions;Lattice QCD