In a previous work, we showed that unresolved excited state contaminations provide a major source of systematic uncertainty in the calculation of the nucleon electric dipole moment due to the QCD topological term theta. Here we extend the calculation to the quark chromo-electric dipole moment operator (qcEDM). We also show quantitatively the impact of the mixing of the qcEDM with lower-dimensional operators on the lattice. Finally, we present preliminary results from a unitary clover-on-clover calculation for the QCD topological term.
@article{arxiv.2301.08161,
title = {nEDM from the theta-term and chromoEDM operators},
author = {Tanmoy Bhattacharya and Vincenzo Cirigliano and Rajan Gupta and Emanuele Mereghetti and Boram Yoon},
journal= {arXiv preprint arXiv:2301.08161},
year = {2023}
}
Comments
Talk presented at the 39th International Symposium on Lattice Field Theory (Lattice2022)