Speaker
Description
AmPyL is an open-source Python package for relating finite-volume lattice data to infinite-volume scattering amplitudes, with particular emphasis on three-particle systems. The library provides an object-oriented framework for constructing all aspects of the relativistic-field-theory three-particle formalism, including flavor and spectator channel spaces, finite-volume kinematics, finite-volume irreducible-representation projections, finite-volume matrices, two- and three-body K matrices, and quantization conditions. This talk will introduce the structure of AmPyL, show how it can be used to compute three-particle finite-volume spectra from amplitude parameters, and discuss its role in making multi-hadron amplitude extraction more transparent, reproducible, and accessible.