2024/04/21 by Tanmoy Bhattacharya, Bhattacharya, Tanmoy, Vincenzo Cirigliano +9
Physics and Astronomy · #Atomic and Subatomic Physics Research #Quantum, superfluid, helium dynamics #Nuclear Physics and Applications
paper · pdf · doi:10.48550/arxiv.2404.13516
We present results from our lattice QCD study of the contribution of the isovector quark cEDM (qcEDM) operator to the neutron EDM. The calculation was carried out on four 2+1+1-flavor highly improved staggered quark ensembles (provided to us by the MILC collaboration) using Wilson-clover quarks to construct correlation functions. We use the nonsinglet axial Ward identity including corrections up to O(a) to show how to control the power-divergent mixing of the isovector qcEDM operator with the lower dimensional pseudoscalar operator. Results for the nEDM are presented after conversion to the MS scheme at the leading-log order.