# The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

## Eta pole contributions to HLbL at the physical point

Aug 11, 2022, 11:30 AM
20m
CP1-HSZ/Ground-0.001 - HS3 (CP1-HSZ)

### CP1-HSZ/Ground-0.001 - HS3

#### CP1-HSZ

50
Oral Presentation QCD in searches for physics beyond the Standard Model

### Speaker

Sebastian Andreas Burri (University of Bern)

### Description

We report on our computation of the eta transition form factor $\mathcal{F}_{\eta \rightarrow \gamma^* \gamma^*}$ from
twisted mass lattice QCD at physical quark masses and at a single lattice spacing.
hadronic light-by-light scattering in the muon $g-2$, leading to a first lattice QCD estimate. Our estimate of $a_\mu^{\eta-pole}$ obtained at a single lattice spacing achieves an