paper

Heavy semileptonics with a fully relativistic mixed action

arXiv:1911.02412

Abstract

The first phase of a heavy quark program based on twisted mass valence quarks has been presented at last years's lattice conference. The CLS $N_{f} = 2 + 1$ ensembles were used for their fine lattice spacing, while twisting the masses is expected to reduce discretisation errors even further and allow for a fully relativistic calculation. We present our strategy and preliminary results on three point functions, corresponding to $D \to K$ and $D \to I ¨ $ semileptonic decays. The form factors for $m_{u} = m_{d} = m_{s}$ quark masses obtained as a first step are shown here to be at the percent level in statistical precision at $q^{2} = 0$ .

7 pages, 3 figures, Presented at the 37th International Symposium on Lattice Field Theory (Lattice 2019), 16-22 June 2019, Wuhan, China