Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
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
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Pre-published on: May 16, 2022
Published on:
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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