Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite-volume matrix elements of two-body states   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.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th