Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unquenched QCD with Light Quarks   We present recent results in unquenched lattice QCD with two degenerate light
sea quarks using the truncated determinant approximation (TDA). In the TDA the
infrared modes contributing to the quark determinant are computed exactly up to
some cutoff in quark off-shellness (typically 2$\Lambda_{QCD}$). This approach
allows simulations to be performed at much lighter quark masses than possible
with conventional hybrid MonteCarlo techniques. Results for the static energy
and topological charge distributions are presented using a large ensemble
generated on very coarse (6$^4$) but physically large lattices. Preliminary
results are also reported for the static energy and meson spectrum on 10$^3$x20
lattices (lattice scale $a^{-1}$=1.15 GeV) at quark masses corresponding to
pions of mass $\leq$ 200 MeV. Using multiboson simulation to compute the
ultraviolet part of the quark determinant the TDA approach becomes an exact
with essentially no increase in computational effort. Some preliminary results
using this fully unquenched algorithm are presented.

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The categories of this paper are: supr-con
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-bio
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: nucl-th