PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Poster reception
Disconnected hadronic vacuum polarization contribution to the muon g-2 with HISQ
S. Yamamoto,* C. DeTar, A. El-Khadra, C. McNeile, R. Van de Water, A. Vaquero on behalf of Fermilab Lattice, HPQCD, and MILC Collaborations
*corresponding author
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Published on: May 29, 2019
Abstract
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 $32^3\times48$ with an approximate lattice spacing of $\sim0.15$ fm and with physical sea-quark masses. We describe the methodology and the analysis procedure.
DOI: https://doi.org/10.22323/1.334.0322
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