Frison, Julien; Bussone, Andrea; Herdoíza, Gregorio; Pena, Carlos; Romero, Jose Ángel; Ugarrio, Javier
arXiv (Cornell University),
11/2019
Paper, Journal Article
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 \(D\to\pi\) 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 \(q^2=0\).
