We describe a computation of the contribution to the anomalous magnetic moment of the muon from the disconnected part of the hadronic vacuum polarization. We use the highly-improved staggered quark (HISQ) formulation for the current density with gauge configurations generated with four flavors of HISQ sea quarks. The computation is performed by stochastic estimation of the current density using the truncated solver method combined with deflation of low-modes. The parameters are tuned to minimize the computational cost for a given target uncertainty in the current-current correlation function. The calculation presented here is carried out on a single gauge-field ensemble of size 323×48 with an approximate lattice spacing of ∼0.15 fm and with physical sea-quark masses. We describe the methodology and the analysis procedure
@article{arxiv.1811.06058,
title = {Disconnected hadronic vacuum polarization contribution to the muon g-2 with HISQ},
author = {Shuhei Yamamoto and Carleton DeTar and Aida X. El-Khadra and Craig McNeile and Ruth S. Van de Water and Alejandro Vaquero},
journal= {arXiv preprint arXiv:1811.06058},
year = {2019}
}
Comments
7 pages, 4 figures, The 36th Annual International Symposium on Lattice Field Theory - LATTICE2018