TY  - JOUR
AU  - Guo, F.-K.
AU  - Horsley, R.
AU  - Meißner, U.-G.
AU  - Nakamura, Y.
AU  - Perlt, H.
AU  - Rakow, P. E. L.
AU  - Schierholz, G.
AU  - Schiller, A.
AU  - Zanotti, J. M.
TI  - Electric Dipole Moment of the Neutron from 2 + 1 Flavor Lattice QCD
JO  - Physical review letters
VL  - 115
IS  - 6
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2016-01041
SP  - 062001
PY  - 2015
N1  - 12 pages, 8 figures, matches PRL published version
AB  - 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}.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000358937600004
C6  - pmid:26296110
DO  - DOI:10.1103/PhysRevLett.115.062001
UR  - https://juser.fz-juelich.de/record/281344
ER  -