Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice QCD Calculation of Nuclear Parity Violation   We present the first lattice QCD calculation of the leading-order
momentum-independent parity violating coupling between pions and nucleons,
$h_{\pi{NN}}^1$. The calculation performs measurements on dynamical anisotropic
clover gauge configurations, with a spatial extent of $L\sim2.5$ fm, a spatial
lattice spacing of $a_s\sim0.123$ fm, and a pion mass of $m_{\pi}\sim389$ MeV.
While this first calculation does not include non-perturbative renormalization
of the bare parity-violating operators, a chiral extrapolation to the physical
pion mass, or contributions from disconnected (quark-loop) diagrams, these are
expected to result in systematic errors within the quoted statistical error. We
find a contribution from the `connected' diagrams of
$h_{\pi{NN}}^{1,con}=(1.099\pm0.505^{+0.058}_{-0.064})\times10^{-7}$,
consistent with current experimental bounds and previous model-dependent
theoretical predictions.

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The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat