[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Jan. 8, 2018
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

Luchang Jin
University of Connecticut

*Hadronic Light-by-Light Contribution to Muon g-2 with Lattice QCD **
**and Infinite Volume, Continuum QED*

We report our recent progress on the lattice calculation of the hadronic 
light-by-light (HLbL) contribution
muon $g-2$. Previously, we have completed the connected diagrams and the 
leading disconnected diagrams
calculation on the $48^3 \times 96$ lattice with physical pion mass and 
5.5 fm box size. The result is
$a_\mu = 5.35(1.35)\times 10^{-10}$, where the error is statistical 
only. We expected sizable finite volume
errors, mostly from the QED part of the calculation. To address this 
issue, we developed a strategy which
allows the QED part of the HLbL diagram being evaluated separately in 
the infinite volume with continuum
propagators. We have obtained some preliminary results on RBC/UKQCD's 
recently generated coarse
$48^3\times 64$ lattice with physical pion mass and 9.6 fm box size.
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