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Theory Center Seminar<br>
Monday, Jan. 8, 2018<br>
1:00 p.m. (coffee at 12:45 p.m.)<br>
CEBAF Center, Room L102<br>
<br>
Luchang Jin<br>
University of Connecticut<br>
<br>
<b>Hadronic Light-by-Light Contribution to Muon g-2 with Lattice QCD
</b><b><br>
</b><b>and Infinite Volume, Continuum QED</b><br>
<br>
We report our recent progress on the lattice calculation of the
hadronic light-by-light (HLbL) contribution<br>
muon $g-2$. Previously, we have completed the connected diagrams and
the leading disconnected diagrams<br>
calculation on the $48^3 \times 96$ lattice with physical pion mass
and 5.5 fm box size. The result is <br>
$a_\mu = 5.35(1.35)\times 10^{-10}$, where the error is statistical
only. We expected sizable finite volume<br>
errors, mostly from the QED part of the calculation. To address this
issue, we developed a strategy which <br>
allows the QED part of the HLbL diagram being evaluated separately
in the infinite volume with continuum<br>
propagators. We have obtained some preliminary results on
RBC/UKQCD's recently generated coarse <br>
$48^3\times 64$ lattice with physical pion mass and 9.6 fm box size.
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