PoS - Proceedings of Science
Volume 363 - 37th International Symposium on Lattice Field Theory (LATTICE2019) - Main session
Heavy semileptonics with a fully relativistic mixed action
J. Frison*, A. Bussone, G. Herdoiza, C. Pena, J.A. Romero and J. Ugarrio
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Pre-published on: December 05, 2019
Published on: August 27, 2020
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 $q^2=0$.
DOI: https://doi.org/10.22323/1.363.0234
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