Neutron Electric Dipole Moments with Clover Fermions

Journal Article · 31 January 2020 · PoS - Proceedings of Science

DOI: https://doi.org/10.22323/1.363.0243 · OSTI ID:1778765

Yoon, Boram  ^[1]; Bhattacharya, Tanmoy  ^[1]; Cirigliano, Vincenzo  ^[1]; Gupta, Rajan  ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We present preliminary results for the contributions to the neutron EDM arising from the QCD θ-term, the Weinberg three-gluon and the quark chromo-EDM operators from our ongoing lattice calculations using clover valence quarks on the MILC HISQ lattices. We use the gradient-flow technique to smooth the lattices and renormalize the gluonic operators, and use the Schwinger source method to incorporate the quark chromo-EDM interactions in the quark propagator. For the QCD θ-term and the Weinberg three-gluon operator, we report results in the gradient-flow scheme from 8 ensembles at four lattice spacings and three pion masses, including 2 physical pion mass ensembles. For the quark chromo-EDM, unrenormalized results are presented at two lattice spacings, a=0.12 and 0.09 fm, and two pion masses, M_π=310 MeV and 220 MeV.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: LDRD
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 1778765
• Report Number(s): LA-UR--19-32467
• Journal Information: PoS - Proceedings of Science, Journal Name: PoS - Proceedings of Science Vol. 363; ISSN 1824-8039
• Publisher: SISSACopyright Statement
• Country of Publication: United States
• Language: English