Full QCD calculation of neutron electric dipole moment with the external electric field method

Abstract

We have calculated the neutron electric dipole moment (NEDM) in the presence of the CP violating $\theta$ term in lattice QCD with 2-flavor dynamical clover quarks, using the external electric field method. Accumulating a large number of statistics by the averages over 16 different source points and over forward and backward nucleon propagators, we have obtained non-zero signals of neutron and proton EDM beyond one standard deviation at each quark mass in full QCD. We have investigated the quark mass dependence of nucleon EDM in full QCD, and have found that nucleon EDM in full QCD does not decrease toward the chiral limit, as opposed to the theoretical expectation. We briefly discuss possible reasons for this behavior.

arXiv comment27 pages, 15 figures, 2 tables, reference added, tyops corrected, published version

References in corpus (15)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Electric dipole moments as probes of new physics
• Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
• Light Hadron Spectroscopy with Two Flavors of Dynamical Quarks on the Lattice
• Theta-Induced Electric Dipole Moment of the Neutron via QCD Sum Rules
• Neutron EDM from Electric and Chromoelectric Dipole Moments of Quarks
• Theta Vacua, QCD Sum Rules, and the Neutron Electric Dipole Moment
• Hadronic EDMs induced by the strangeness and constraints on supersymmetric CP phases
• Electromagnetic and spin polarisabilities in lattice QCD
• Calculation of the neutron electric dipole moment with two dynamical flavors of domain wall fermions
• Neutron electric dipole moment with external electric field method in lattice QCD
• Axions 05
• Topological Susceptibility in Lattice QCD with Two Flavors of Dynamical Quarks
• The Theta Term in QCD Sum Rules and the Electric Dipole Moment of the Vector Meson

Cited by in corpus (49)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond
• The neutron and its role in cosmology and particle physics
• Theta dependence of SU(N) gauge theories in the presence of a topological term
• A new class of variance reduction techniques using lattice symmetries
• Searching for New Physics beyond the Standard Model in Electric Dipole Moment
• Probing exotic phenomena at the interface of nuclear and particle physics with the electric dipole moments of diamagnetic atoms: A unique window to hadronic and semi-leptonic CP violation
• Covariant approximation averaging
• Renormalization Group Running of Dimension-Six Sources of Parity and Time-Reversal Violation
• QCD Corrections to Neutron Electric Dipole Moment from Dimension-six Four-Quark Operators
• The electric dipole moment of the neutron from 2+1 flavor lattice QCD
• New insights into the neutron electric dipole moment
• Dimension-5 CP-odd operators: QCD mixing and renormalization
• Nucleon Scalar and Tensor Charges from Lattice QCD with Light Wilson Quarks
• Reevaluation of Neutron Electric Dipole Moment with QCD Sum Rules
• P- and T-Violating Lagrangians in Chiral Effective Field Theory and Nuclear Electric Dipole Moments
• The Effective Chiral Lagrangian From the Theta Term
• The Nucleon Electric Dipole Form Factor From Dimension-Six Time-Reversal Violation
• On Lattice Calculation of Electric Dipole Moments and Form Factors of the Nucleon
• Baryon electric dipole moments from strong CP violation
• The Role of Lattice QCD in Searches for Violations of Fundamental Symmetries and Signals for New Physics
• The Time-Reversal- and Parity-Violating Nuclear Potential in Chiral Effective Theory
• Review of the electric dipole moment of light nuclei
• Violations of discrete space-time symmetries in chiral effective field theory
• Neutron Electric Dipole Moment Induced by the Strangeness Revisited
• Neutron electric dipole moment using $N_f=2+1+1$ twisted mass fermions
• The nucleon electric dipole moment with the gradient flow: the $\theta$-term contribution
• A Fresh Look into the Neutron EDM and Magnetic Susceptibility
• Neutron and proton electric dipole moments from $N_f=2+1$ domain-wall fermion lattice QCD
• Lattice QCD with strong external electric fields
• Hadron-quark phase transition in asymmetric matter with boson condensation
• Chiral perturbation theory in a theta vacuum
• Non-perturbative renormalization scheme for the CP-odd three-gluon operator
• Neutron in a Strong Magnetic Field: Finite Volume Effects
• Finite-volume corrections to the CP-odd nucleon matrix elements of the electromagnetic current from the QCD vacuum angle
• Overview of external electromagnetism and rotation in lattice QCD
• Novel applications of Lattice QCD: Parton distribution functions, proton charge radius and neutron electric dipole moment
• Reconciling the lattice background field method with nonrelativistic QED: Spinor case
• Background Electromagnetic Fields and NRQED Matching: Scalar Case
• Elementary quantum mechanics of the neutron with an electric dipole moment
• The Beauty of Spin
• Recent progress in hadron structure from Lattice QCD
• Progress in the Nucleon Electric Dipole Moment Calculations in Lattice QCD
• Electric dipole moments: a theory overview
• Error reduction technique using covariant approximation and application to nucleon form factor
• The electric dipole moment of the neutron from $N_f=2+1+1$ twisted mass fermions
• Computing Nucleon Electric Dipole Moment from lattice QCD
• New Physics Searches from Nucleon Matrix Elements in Lattice QCD
• Hadron Structure on the Lattice