Journal Article

FZJ-2016-01041

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electric Dipole Moment of the Neutron from 2 + 1 Flavor Lattice QCD

Guo, F.-K. ; Horsley, R. ; Meißner, U.-G.FZJ* ; Nakamura, Y. ; Perlt, H. ; Rakow, P.  E.  L. ; Schierholz, G. ; Schiller, A. ; Zanotti, J.  M.

2015
APS College Park, Md.

This record in other databases:      

Please use a persistent id in citations: http://hdl.handle.net/2128/9772  doi:10.1103/PhysRevLett.115.062001

Abstract: 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}.

Note: 12 pages, 8 figures, matches PRL published version

---

Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. Theorie der starken Wechselwirkung (IKP-3)
3. John von Neumann - Institut für Computing (NIC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076) (196253076)
3. Disconnected Contributions to Matrix Elements and Renormalization factors (hde12_20141101) (hde12_20141101)

Appears in the scientific report 2015

---

Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---