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Neutron and proton electric dipole moments from N_f=2+1 domain-wall fermion lattice QCD

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arxiv 1512.00566 v1 pith:NAL3HK7U submitted 2015-12-02 hep-lat hep-phnucl-th

Neutron and proton electric dipole moments from N_f=2+1 domain-wall fermion lattice QCD

Eigo Shintani , Thomas Blum , Taku Izubuchi , Amarjit Soni This is my paper
classification hep-lat hep-phnucl-th
keywords latticeneutronprotonactioncalculationchiraldipoledomain-wall
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a lattice calculation of the neutron and proton electric dipole moments (EDM's) with $N_f=2+1$ flavors of domain-wall fermions. The neutron and proton EDM form factors are extracted from three-point functions at the next-to-leading order in the $\theta$ vacuum of QCD. In this computation, we use pion masses 0.33 and 0.42 GeV and 2.7 fm$^3$ lattices with Iwasaki gauge action and a 0.17 GeV pion and 4.6 fm$^3$ lattice with I-DSDR gauge action, all generated by the RBC and UKQCD collaborations. The all-mode-averaging technique enables an efficient and high statistics calculation. Chiral behavior of lattice EDM's is discussed in the context of baryon chiral perturbation theory. In addition, we also show numerical evidence on relationship of three- and two-point correlation function with local topological distribution.

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Cited by 2 Pith papers

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  1. The Neutron Electric Dipole Moment from Lattice QCD using a Background Electric Field

    hep-lat 2026-07 conditional novelty 7.0

    Using background electric fields, local topological charge, and non-Hermitian GEVP, lattice QCD yields dn = -0.0050(4)stat(8)sys θ-bar e fm at the physical point.

  2. One-loop matching of the LEFT to the QCD gradient flow

    hep-ph 2026-01 conditional novelty 7.0

    All one-loop matching coefficients connecting the full baryon- and lepton-number-conserving low-energy effective field theory up to dimension six to the QCD gradient flow are computed.