Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flavor symmetry breaking in lattice QCD with a mixed action   We study the phase structure of mixed-action QCD with two Wilson sea quarks
and any number of chiral valence quarks (and ghosts), starting from the chiral
lagrangian. A priori, the effective theory allows for a rich phase structure,
including a phase with a condensate made of sea and valence quarks. In such a
phase, mass eigenstates would become admixtures of sea and valence fields, and
pure-sea correlation functions would depend on the parameters of the valence
sector, in contradiction with the actual setup of mixed-action simulations.
Using that the spectrum of the chiral Dirac operator has a gap for nonzero
quark mass we prove that spontaneous symmetry breaking of the flavor symmetries
can only occur within the sea sector. This rules out a mixed condensate, and
implies restrictions on the low-energy constants of the effective theory.

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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci