PoS - Proceedings of Science
Volume 430 - The 39th International Symposium on Lattice Field Theory (LATTICE2022) - QCD in searches for physics beyond the Standard Model
nEDM from the theta-term and chromoEDM operators
T. Bhattacharya*, V. Cirigliano, R. Gupta, E. Mereghetti and B. Yoon
Full text: pdf
Pre-published on: February 03, 2023
Published on: April 06, 2023
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.
DOI: https://doi.org/10.22323/1.430.0304
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