Pion-pole contribution to HLbL from twisted mass lattice QCD at the physical point
S.A. Burri*,
C. Alexandrou,
S. Bacchio,
G. Bergner,
J. Finkenrath,
A. Gasbarro,
K. Hadjiyiannakou,
K. Jansen,
B. Kostrzewa,
G. Koutsou,
K. Ottnad,
M. Petschlies,
F. Pittler,
F. Steffen,
C. Urbach and
U. Wenger*: corresponding author
Pre-published on:
May 16, 2022
Published on:
July 08, 2022
Abstract
We report on our computation of the pion transition form
factor ${\cal F}_{P\rightarrow \gamma^*\gamma^*}$ from twisted mass lattice QCD in order to determine the
numerically dominant light pseudoscalar pole contribution in the
hadronic light-by-light scattering contribution to the anomalous
magnetic moment of the muon $a_\mu =(g-2)_\mu$. The pion transition form
factor is computed directly at the physical point. We present first
results for our estimate of the pion-pole contribution with
kinematic setup for the pion at rest.
DOI: https://doi.org/10.22323/1.396.0519
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