Asia-Pacific Symposium for Lattice Field Theory (APLAT 2020)

P-wave form factors from the inclusive semileptonic B rightarrowXcℓν decays

4 Aug 2020, 17:20

20m

online

Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions

Speaker

Gabriela Bailas (*) (KEK)

Description

We report our estimation for the Isgur-Wise form factors for the inclusive semileptonic $B\to X_c\ell \nu$ on 2+1-flavor lattice QCD.
The M\"obius domain-wall fermion action is used for light, strange, charm and bottom quarks. The structure function receives contributions from various exclusive modes, including the dominant S-wave states $D_s^{(\ast )}$ as well as the P-wave states $D_s^{\ast \ast }$. In this work, we identify and separate these contributions in the lattice data, from
which we put some constraints on the $B_s\to D_s^{\ast \ast }\ell \nu$ form factors. Our work takes into account the structure functions for the cases of zero-recoil and non-zero recoil.

Presentation materials

Lattice2020_BAILAS.pdf