# The 34th International Symposium on Lattice Field Theory (Lattice 2016)

Jul 24 – 30, 2016
Highfield Campus, University of Southampton
Europe/London timezone

## Hypercubic effects in semileptonic $D \to \pi$ decays on the lattice

Jul 29, 2016, 2:40 PM
20m
Building 67 Room 1003 (Highfield Campus, University of Southampton)

### Building 67 Room 1003

#### Highfield Campus, University of Southampton

Talk Weak Decays and Matrix Elements

### Speaker

Giorgio Salerno (Università di Roma Tre)

### Description

We present lattice results of the form factors relevant for semileptonic $D\to\pi \ell \nu$ decays, using the gauge ensembles produced by the European Twisted Mass Collaboration with Nf=2+1+1 flavors of dynamical quarks, at three values of the lattice spacing and pion masses as low as 210 MeV. We have computed the matrix elements of both the vector and scalar weak currents for several kinematic configurations corresponding to moving parent and child mesons. The lattice data exhibit the presence of hypercubic effects. Our preliminary results for the momentum dependence of the form factors and for the vector form factor at zero-momentum transfer, f+(0), are obtained by removing such lattice effects.

### Primary author

Vittorio Lubicz (Università di Roma Tre)

### Co-authors

Cecilia Tarantino (Università di Roma Tre) Giorgio Salerno (Università di Roma Tre) Lorenzo Riggio (INFN Roma Tre) Silvano Simula (INFN Roma Tre)

 Slides