Neutron electric polarizability from unquenched lattice QCD using the background field approach

Neutron Electric Dipole Moment from Lattice QCD

Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan Riken BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973, USA Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan Department of Physics, Nagoya University, Nagoya 464-8602, Japan Department of Physics, Hiroshima University, Higashi-...

Magnetic polarizability of hadrons from lattice QCD in the background field method

We present a calculation of hadron magnetic polarizability using the techniques of lattice QCD. This is carried out by introducing a uniform external magnetic field on the lattice and measuring the quadratic part of a hadron’s mass shift. The calculation is performed on a 24 lattice with standard Wilson actions at beta=6.0 (spacing a = 0.1 fm) and pion mass down to about 500 MeV. Results are ob...

Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD.

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...

BOSONIC FIELD METHODS FOR UNQUENCHED LATTICE QCD by

An estimate of the chiral condensate from unquenched lattice QCD

Using the parameters in the chiral Lagrangian obtained by MILC from their unquenched lattice QCD calculations with 2+1 flavours of sea quarks, I estimate the chiral condensate. I obtain the result 〈ψψ〉(2 GeV)/nf = −(259 ± 27 MeV) in the MS scheme. I compare this value to other determinations.