Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic splitting of quark and pseudoscalar meson masses from
  dynamical QCD + QED   Lattice QCD simulations are now reaching a precision where electromagnetic
corrections from QED become important. In investigating the effects of SU(3)
breaking due to quark mass differences within QCD, a group-theoretical analysis
of the mass dependence greatly helped us organize our results. We now do the
same with electromagnetic charge effects by extending the calculations to
dynamical 1+1+1 flavor QCD + QED.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom