Connected and leading disconnected hadronic light-by-light contribution to the muon anomalous magnetic moment with a physical pion mass
- Univ. of Connecticut, Storrs, CT (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Columbia Univ., New York, NY (United States)
- Nagoya Univ., Nagoya (Japan); RIKEN, Saitama (Japan)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
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 483 × 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 aHLbLμ = 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. Finally, the omitted disconnected graphs, while expected to give a correction of order 10%, also need to be computed.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- SC00112704; FG02-92ER40716; SC0011941; AC02-06CH11357; AC02-98CH10886
- OSTI ID:
- 1354628
- Alternate ID(s):
- OSTI ID: 1339018
- Report Number(s):
- BNL-113726-2017-JA; PRLTAO; KA2401012
- Journal Information:
- Physical Review Letters, Vol. 118, Issue 2; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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