AI Article Synopsis
- The research provides a lattice QCD calculation of the hadronic light-by-light contribution to the muon anomalous magnetic moment using a physical pion mass.
- The calculation accounts for both connected diagrams and leading quark-line-disconnected diagrams and employs improved algorithms from prior work.
- The result shows a_{μ}^{HLbL} = 5.35(1.35)×10^{-10}, highlighting that further investigation is needed for potential errors related to finite volume and lattice spacing, as well as the impact of omitted disconnected graphs.
Article Abstract
We report a lattice QCD calculation of the hadronic light-by-light contribution to the muon anomalous magnetic moment at a physical pion mass. The calculation includes the connected diagrams and the leading, quark-line-disconnected diagrams. We incorporate algorithmic improvements developed in our previous work. The calculation was performed on the 48^{3}×96 ensemble generated with a physical pion mass and a 5.5 fm spatial extent by the RBC and UKQCD Collaborations using the chiral, domain wall fermion formulation. We find a_{μ}^{HLbL}=5.35(1.35)×10^{-10}, where the error is statistical only. The finite-volume and finite lattice-spacing errors could be quite large and are the subject of ongoing research. The omitted disconnected graphs, while expected to give a correction of order 10%, also need to be computed.
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| http://dx.doi.org/10.1103/PhysRevLett.118.022005 | DOI Listing |
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