Speaker
Dr
Lorenzo Riggio
(INFN Roma Tre)
Description
We present lattice results for the form factors relevant for K -> pi l nu decays, obtained from simulations performed 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 250 MeV.
Our determination of f_+(0), which in combination with the experimental result for (f_+(0)*V_us) can be used to determine the CKM matrix element, will be presented along with a study of both the vector and the scalar form factors as functions of the momentum transfer comparing our results with the experimental ones.
Primary author
Dr
Lorenzo Riggio
(INFN Roma Tre)
Co-authors
Dr
Nuria Carrasco
(INFN Roma Tre)
Mr
Paolo Lami
(Roma Tre)
Dr
Silvano Simula
(INFN Roma Tre)
Prof.
Vittorio Lubicz
(Roma Tre)
