Speaker
William Parrott
(University of Glasgow)
Description
We present HPQCD's improved scalar, vector and tensor form factors for $B \to K$ decay using the Highly Improved Staggered Quark formalism for more accurate normalisation of the weak currents and working on very fine lattices to cover the full physical $q^2$ range. Our uncertainties at $q^2=0$ are a factor of three better than earlier work.
We compare Standard Model observables using our form factors to experimental measurements for the rare FCNC processes $B \to K \ell^+\ell^-$ and $B \to K \nu\bar{\nu}$ and discuss the significance of the tensions that arise.
Authors
Dr
Chris Bouchard
(University of Glasgow)
Christine Davies
(University of Glasgow)
William Parrott
(University of Glasgow)