The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Contribution of QCD theta-term to nEDM with Stabilized Wilson Fermions

Not scheduled

20m

CP1-HSZ/0.001 (CP1-HSZ) - HS3 (CP1-HSZ)

Oral Presentation QCD in searches for physics beyond the Standard Model QCD in searches for physics beyond the Standard Model

Speaker

Jangho Kim (FZJ)

Description

The QCD theta term is a source of CP-violation that could potentially induce a non-vanishing neutron electric dipole moment (nEDM). Previous lattice calculations have had difficulties in extracting the nEDM, especially when close to the physical value of the pion mass. In this contribution we present first results obtained with Stabilized Wilson Fermions. We focus on SU($3$) flavor-symmetric OpenLat ensembles at $\sim~400$ MeV pion mass, and $3$ different lattice spacings in the range of $0.065$ fm $< a < 0.12$. We use O($100$) stochastic source locations to improve the signal-to-noise ratio.