The 33rd International Symposium on Lattice Field Theory (Lattice 2015)

Scalar and vector form factors of $D \to \pi \ell \nu$ decays with $N_f=2+1+1$ Twisted fermions

15 Jul 2015, 14:20

20m

404 (Kobe International Conference Center)

Talk Standard Model Parameters and Renormalization Standard Model Parameters and Renormalization

Speaker

Mr Paolo Lami (Università degli Studi Roma Tre & INFN sezione Roma Tre)

Description

We present lattice results for the form factors relevant for $D \to \pi \ell \nu$ decays, obtained from simulations performed by the European Twisted Mass Collaboration with $N_f=2+1+1$ flavors of dynamical quarks, at three values of the lattice spacing and pion masses as low as $210$ MeV. We computed both the vector and the scalar form factors, studied their dependance on the momentum transfer and compared our results with the experimental ones. Specifically, by combining our determination of $f_+(0)$ with the experimental result for $ |f_+(0)V_{cd}|$ we are able to determine the CKM matrix element.

Presentation materials

Slides

Slide_Latt2015_DpiK.pdf