Solving relativistic three-body integral equations in the presence of bound states
Abstract
We present a systematically improvable method for numerically solving relativistic three-body integral equations for the partial-wave projected amplitudes. The method consists of a discretization procedure in momentum space, which approximates the continuum problem with a matrix equation. It is solved for different matrix sizes, and in the end, an extrapolation is employed to restore the continuum limit. Our technique is tested by solving a three-body problem of scalar particles with an wave two-body bound state. We discuss two methods of incorporating the pole contribution in the integral equations, both of them leading to agreement with previous results obtained using finite-volume spectra of the same theory. We provide an analytic and numerical estimate of the systematic errors. Although we focus on kinematics below the three-particle threshold, we provide numerical evidence that the methods presented allow for determination of amplitude above this threshold as well.
Keywords
Cite
@article{arxiv.2010.09820,
title = {Solving relativistic three-body integral equations in the presence of bound states},
author = {Andrew W. Jackura and Raúl A. Briceño and Sebastian M. Dawid and Md Habib E Islam and Connor McCarty},
journal= {arXiv preprint arXiv:2010.09820},
year = {2021}
}
Comments
20 pages, 9 figures