Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The electric dipole moment of the neutron from 2+1 flavor lattice QCD   We compute the electric dipole moment d_n of the neutron from a fully
dynamical simulation of lattice QCD with 2+1 flavors of clover fermions and
nonvanishing theta term. The latter is rotated into the pseudoscalar density in
the fermionic action using the axial anomaly. To make the action real, the
vacuum angle theta is taken to be purely imaginary. The physical value of d_n
is obtained by analytic continuation. We find d_n = -3.8(2)(9) x 10^{-16}
[theta e cm], which, when combined with the experimental limit on d_n, leads to
the upper bound theta < 7.6 x 10^{-11}.

36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio