Speaker
Dr
Konstantin Ottnad
(University of Bonn)
Description
We employ lattice techniques to compute both sides of the Witten-Veneziano formula.
For the one side we perform dedicated quenched simulations
and use the spectral projector method to determine the topological
susceptibility in pure Yang-Mills theory. The other side we determine
in lattice QCD with $N_f=2+1+1$ dynamical Wilson twisted mass fermions
including for the first time also the flavour singlet decay constant.
Taking the continuum and the SU$(2)$ chiral limits we compare
both sides and find good agreement within uncertainties.
Primary author
Dr
Konstantin Ottnad
(University of Bonn)
Co-authors
Prof.
Carsten Urbach
(University of Bonn)
Dr
Elena Garcia-Ramos
(Humboldt University Berlin and NIC, DESY Zeuthen)
Dr
Karl Jansen
(NIC, DESY Zeuthen)
Dr
Krzysztof Cichy
(Goethe University Frankfurt)
