Speaker
Mr
Shuhei Yamamoto
(The University of Utah)
Description
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 $32^3 \times 48$ with an approximate lattice spacing of 0.15 fm and with physical sea-quark masses. We describe the methodology and the analysis procedure.
Primary author
Mr
Shuhei Yamamoto
(The University of Utah)
Co-authors
Prof.
Aida El-Khadra
(University of Illinois at Urbana-Champaign)
Dr
Alejandro Vaquero
(University of Utah)
Carleton DeTar
(University of Utah)
Dr
Craig McNeile
(University of Plymouth)
Dr
Ruth Van de Water
(Fermilab)