Speaker
Dr
Antoine Gérardin
(Laboratoire de Physique Corpusculaire (LPC))
Description
We will present our results for the radial distributions of the axial density in the heavy-light B meson in the static limit of HQET: $\langle B(\vec{p}) | A_{\mu}(\vec{r}) | B^{*(\prime)}(\vec{p}^{\ \prime}, \lambda) \rangle$. Here, $r$ is the distance between the static heavy quark and the insertion of the axial current acting like a probe. Using the Generalized Eigenvalue Problem, we are able to isolate the first radial excitation of the vector $B^{*}$ meson and the associated density. After discussing the results, we will show how these distributions allow us to determine the $B^{*\prime}B\pi$ coupling at the kinematical point $q^2=0 \neq m_{B^{*\prime}}-m_B$. The simulations are performed using CLS gauge configurations with Nf=2 non-pertubatively $O(a)$-improved Wilson-Clover fermions and Heavy Quark Effective Theory in the static limit.
Primary authors
Dr
Antoine Gérardin
(Laboratoire de Physique Corpusculaire (LPC))
Dr
Benoit Blossier
(Laboratoire de Physique Théorique d'Orsay)
