Lattice calculations of Ds to eta and eta' decay form factors

Abstract

We report on lattice results of the form factors for semi-leptonic decays of the D_s meson to eta and eta', with n_f=2+1 configurations. The calculation contains disconnected fermion loop diagrams, which are challenging to calculate on the lattice. Our result shows that the disconnected diagrams give significant contributions to the form factors.

Comments: 8 pages, 9 figures, talk at the Confinement X conference (8-12 October 2012, TUM Campus Garching, Munich.)