Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Correlation functions with Karsten-Wilczek fermions   The Karsten-Wilczek action describes two chiral fermions but breaks the
symmetries under both charge conjugation ($ \widehat{C}) $ and time reflection
($ \widehat{\Theta} $) explicitly, though invariance under $ \widehat{C\Theta}
$ and a mirror fermion symmetry $ \widehat{T\Theta} $ are maintained. These
proceedings outline how the action's symmetries and the presence of the second
fermion emerge in mesonic correlation functions.
  The residual symmetries explain the non-observation of broken time-reflection
symmetry in a class of mesonic correlation functions. Time-reflection symmetry
is enforced for correlation functions that are manifestly invariant under $
\widehat{C} $ or $ \widehat{T} $. Due to contributions from the second fermion,
oscillating contributions arise in some mesonic correlation functions. A second
condition for non-perturbative tuning of the relevant counterterm is obtained
from these oscillations. Both non-perturbative tuning conditions are
independent and agree within errors. Due to contributions from the second
fermion, additional pseudoscalar states are observed in non-standard channels.
Mass splittings between these additional states and the Goldstone boson vanish
as $ \mathcal{O}(a^2) $.

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The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs