Heavy semileptonics with a fully relativistic mixed action

Julien Frison, Andrea Bussone, Gregorio Herdoiza, Carlos Pena, Jose Angel Romero, Javier Ugarrio
2019 Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)   unpublished
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 → K and D → π semileptonic decays. The form factors for m u = m d = m
more » ... 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.
doi:10.22323/1.363.0234 fatcat:f3b3wp5gfnfevipntnxxqs3rxe