Speaker
Luka Leskovec
(Jozef Stefan Institute)
Description
The CKM matrix element $V_{ub}$ is both the smallest and least known of all CKM matrix elements; its current value has been determined in many ways, but directly primarily through the exclusive process $B\to\pi\ell\nu$. In this talk, we will present our progress towards a lattice QCD determination of the $V_{ub}$ matrix element from a novel transition - $B\to \rho \ell \nu$. On this ensemble, with $N_f=2+1$ clover fermions with masses corresponding to $m_\pi$ ~ $320$ MeV and $L=3.6$ fm, the $\rho$ appears as a resonance in $\pi\pi$ scattering. We will briefly introduce the theoretical framework and discuss some preliminary results.
Author
Luka Leskovec
(Jozef Stefan Institute)
Co-authors
Prof.
Stefan Meinel
(University of Arizona)
Dr
Marcus Petschlies
(Helmholtz-Instituts für Strahlen- und Kernphysik)
Dr
Srijit Paul
(Johannes Gutenberg-Universität Mainz)
Dr
Gumaro Rendon
(Brookhaven National Laboratory)
Prof.
John Negele
(Massachusetts Institute of Technology)
Prof.
Constantia Alexandrou
(Cyprus Institute)
Prof.
Andrew Pochinsky
(Massachusetts Institute of Technology)