Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Inclusive semi-leptonic $B_{(s)}$ mesons decay at the physical $b$ quark mass

Aug 12, 2022, 2:50 PM
CP1-HSZ/1st-1.002 - HS6 (CP1-HSZ)

CP1-HSZ/1st-1.002 - HS6


Oral Presentation Weak Decays and Matrix Elements Weak Decays and Matrix Elements


Alessandro Barone (University of Southampton)


We address the non-perturbative calculation of the decay rate of the inclusive semi-leptonic $B_{(s)}$ mesons decay from lattice QCD. Precise theoretical Standard Model predictions are key ingredients in searches for new physics. This type of computation may eventually provide new insight into the long-standing tension between the inclusive and exclusive determination of the $V_{cb}$ and $V_{ub}$ CKM matrix elements.
We perform a pilot lattice computation for $B_s \rightarrow X_c \, l \bar{\nu}$ and improve on existing techniques. The valence-quark masses in our simulations are approximately physical for the domain-wall strange and charm quarks as well as for the $b$ quark, for which we use a relativistic heavy quark effective action. We report on our progress and discuss future plans toward a first study with fully controlled systematic effects.

Primary authors

Alessandro Barone (University of Southampton) Andreas Juttner (CERN and University of Southampton) Ryan Kellermann (KEK) Shoji Hashimoto (KEK) Takashi Kaneko (KEK)

Presentation materials