Orateur
M.
William Sutcliffe
(Imperial College London)
Description
A measurement of the ratio of branching fractions between $ \Lambda^0_b \rightarrow p\ \mu^- \bar{\nu} $
and $ \Lambda^0_b \rightarrow \Lambda_c^+ \mu^-\bar{\nu} $
decays is performed using data corresponding to 2fb$^{-1}$ of integrated luminosity, collected by the LHCb detector.
This combined with the latest form factor predictions obtained from lattice QCD calculations leads to the first determination of $\vert V_{ub} \vert$ at a hadron collider and in a baryon decay. The measurement achieves a relative precision of 7.3% which is more precise than any existing published exclusive measurements.
Authors
Dr
Patrick Owen
(Imperial College London)
Prof.
Ulrik Egede
(Imperial College London)
M.
William Sutcliffe
(Imperial College London)
Co-auteur
ckm LHCb
(lapp)
