Pseudoscalar-pole contributions to the muon $g-2$ at the physical point

Burri, S. A.; Kanwar, G.; Alexandrou, C.; Bacchio, S.; Bergner, G.; Finkenrath, J.; Gasbarro, A.; Hadjiyiannakou, K.; Jansen, K.; Kostrzewa, B.; Koutsou, G.; Ottnad, K.; Petschlies, M.; Pittler, F.; Steffens, F.; Urbach, C.; Wenger, U. (2022). Pseudoscalar-pole contributions to the muon $g-2$ at the physical point. In: The 39th International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab 10.22323/1.430.0306

LATTICE2022_306.pdf - Published Version
Available under License Creative Commons: Attribution-Noncommercial-No Derivative Works (CC-BY-NC-ND).

Download (960kB) | Preview

Pseudoscalar-pole diagrams are an important component of estimates of the
hadronic light-by-light (HLbL) contribution to the muon g−2. We report on our computation of the transition form factors P→γ∗γ∗ for the neutral pseudoscalar mesons P=π0
and η . The calculation is performed using twisted-mass lattice QCD with physical quark masses. On the lattice, we have access to a broad range of (space-like) photon four-momenta and therefore produce form factor data complementary to the experimentally accessible single-virtual direction, which directly leads to an estimate of the pion- and η
-pole components of the muon g−2 . For the pion, our result for the g−2 contribution in the continuum is comparable with previous lattice and data-driven determinations, with combined relative uncertainties below 10% . For the η meson, we report on a preliminary determination from a single lattice spacing.

Item Type:

Conference or Workshop Item (Paper)


08 Faculty of Science > Institute of Theoretical Physics
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)

UniBE Contributor:

Burri, Sebastian Andreas, Kanwar, Gurtej Singh, Wenger, Urs


500 Science > 530 Physics


Sissa Medialab




Binia Marti

Date Deposited:

21 Mar 2023 10:57

Last Modified:

21 Mar 2023 23:27

Publisher DOI:





Actions (login required)

Edit item Edit item
Provide Feedback