Speaker
Andria Agadjanov
Description
The extraction of the $B \to K^*$ transition form factors from lattice data at (close to) physical pion masses is discussed. The possible mixing of $\pi K$ and $\eta K$ states is taken into account. Applying non-relativistic effective field theory in a finite volume, the two-channel analogue of the Lellouch-Luscher formula is reproduced. Due to the resonance nature of the $K^*$ , it is shown how the form factors can be determined at the pole position in a process-independent manner. The infinitely-narrow width approximation of the results is also discussed.
Primary author
Co-authors
Dr
Akaki Rusetsky
(University of Bonn)
Prof.
Ulf-G. Meißner
(University of Bonn, Forschungszentrum Jülich)
Prof.
Veronique Bernard
(Paris-Sud University)
