Finite-volume matrix elements of two-body states
High Energy Physics - Lattice
2018-11-02 v1
Abstract
In this talk, we present a framework for studying structural information of resonances and bound states coupling to two-hadron scattering states. This makes use of a recently proposed finite-volume formalism to determine a class of observables that are experimentally inaccessible but can be accessed via lattice QCD. In particular, we shown that finite-volume two-body matrix elements with one current insertion can be directly related to scattering amplitudes coupling to the external current. For two-hadron systems with resonances or bound states, one can extract the corresponding form factors of these from the energy-dependence of the amplitudes.
Cite
@article{arxiv.1811.00368,
title = {Finite-volume matrix elements of two-body states},
author = {Alessandro Baroni and Raúl A. Briceño and Maxwell T. Hansen and Felipe G. Ortega-Gama},
journal= {arXiv preprint arXiv:1811.00368},
year = {2018}
}
Comments
7 pages, 2 figures, Proceedings of Lattice 2018