Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gauge invariant determination of charged hadron masses   In this paper we show, for the first time, that charged-hadron masses can be
calculated on the lattice without relying on gauge fixing at any stage of the
calculations. In our simulations we follow a recent proposal and formulate full
QCD+QED on a finite volume, without spoiling locality, by imposing C-periodic
boundary conditions in the spatial directions. Electrically charged states are
interpolated with a class of operators, originally suggested by Dirac and built
as functionals of the photon field, that are invariant under local gauge
transformations. We show that the quality of the numerical signal of
charged-hadron masses is the same as in the neutral sector and that
charged-neutral mass splittings can be calculated with satisfactory accuracy in
this setup. We also discuss how to describe states of charged hadrons with real
photons in a fully gauge-invariant way by providing a first evidence that the
proposed strategy can be numerically viable.

8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th