title: Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD.
abstract: We present lattice QCD results on the neutron tensor charges including, for the first time, a simultaneous extrapolation in the lattice spacing, volume, and light quark masses to the physical point in the continuum limit. We find that the "disconnected" contribution is smaller than the statistical error in the "connected" contribution. Our estimates in the modified minimal subtraction scheme at 2 GeV, including all systematics, are g_{T}^{d-u}=1.020(76), g_{T}^{d}=0.774(66), g_{T}^{u}=-0.233(28), and g_{T}^{s}=0.008(9). The flavor diagonal charges determine the size of the neutron electric dipole moment (EDM) induced by quark EDMs that are generated in many new scenarios of CP violation beyond the standard model. We use our results to derive model-independent bounds on the EDMs of light quarks and update the EDM phenomenology in split supersymmetry with gaugino mass unification, finding a stringent upper bound of d_{n}<4×10^{-28} e cm for the neutron EDM in this scenario.
authors.affiliation: Los Alamos National Laboratory, Theoretical Division T-2, Los Alamos, New Mexico 87545, USA.
authors.forename: Tanmoy
authors.initials: T
authors.lastname: Bhattacharya
authors.affiliation: Los Alamos National Laboratory, Theoretical Division T-2, Los Alamos, New Mexico 87545, USA.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Cirigliano
authors.affiliation: Los Alamos National Laboratory, Theoretical Division T-2, Los Alamos, New Mexico 87545, USA.
authors.forename: Rajan
authors.initials: R
authors.lastname: Gupta
authors.affiliation: Physics Department, University of California, Berkeley, California 94720, USA.
authors.forename: Huey-Wen
authors.initials: HW
authors.lastname: Lin
authors.affiliation: Los Alamos National Laboratory, Theoretical Division T-2, Los Alamos, New Mexico 87545, USA.
authors.forename: Boram
authors.initials: B
authors.lastname: Yoon
mesh_terms: D004601:Elementary Particles; D008962:Models, Theoretical; D009502:Neutrons; D009686:Nuclear Physics; D013816:Thermodynamics