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nEDM from the theta-term and chromoEDM operators

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arxiv 2301.08161 v1 pith:PJDUT77Q submitted 2023-01-19 hep-lat

Tanmoy Bhattacharya , Vincenzo Cirigliano , Rajan Gupta , Emanuele Mereghetti , Boram Yoon This is my paper · ORCID
classification hep-lat
keywords calculationdipolemomentoperatorsqcedmtermtopologicalchromo-electric
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 1 Pith paper

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  1. Gradient flow of the Weinberg operator

    hep-lat 2025-02 conditional novelty 6.0 of 10

    The paper reports preliminary gradient-flow lattice results for the Weinberg and mixed susceptibilities, but statistical errors are too large to extract a useful Peccei-Quinn theta contribution.

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