Lattice calculation of hadronic light-by-light contribution to the muon anomalous magnetic moment

The quark-connected part of the hadronic light-by-light scattering contribution to the muon's anomalous magnetic moment is computed using lattice QCD with chiral fermions. We report several significant algorithmic improvements and demonstrate their effectiveness through specific calculations wh...

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Bibliographic Details
Published in:Physical review. D 2016-01, Vol.93 (1), Article 014503
Main Authors: Blum, Thomas, Christ, Norman, Hayakawa, Masashi, Izubuchi, Taku, Jin, Luchang, Lehner, Christoph
Format: Article
Language:English
Subjects:
Cooperation
Cosmology
Fermions
Gravitation
Lattices
Magnetic moment
Mathematical analysis
muon
Muons
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
pion
QCD
quark
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Summary:The quark-connected part of the hadronic light-by-light scattering contribution to the muon's anomalous magnetic moment is computed using lattice QCD with chiral fermions. We report several significant algorithmic improvements and demonstrate their effectiveness through specific calculations which show a reduction in statistical errors by more than an order of magnitude. The most realistic of these calculations is performed with a near-physical 171 MeV pion mass on a (4.6fm) super(3) spatial volume using the 32 super(3) x64 Iwasaki+DSDR gauge ensemble of the RBC/UKQCD Collaboration.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.93.014503