TL;DR
This paper presents recent measurements of semileptonic B and Bs meson decays at Belle, providing insights into CKM matrix elements and decay mechanisms through analysis of various decay modes.
Contribution
It reports new experimental results on semileptonic B and Bs decays, including first measurements of semi-inclusive modes and inclusive branching fractions.
Findings
Measurement of B- -> Ds(*) K l nu decay modes
First semi-inclusive B -> D(*) X l nu results
Inclusive branching fraction Bf(Bs -> X l nu)
Abstract
The Belle experiment at the KEKB asymmetric energy e+e- collider recorded large data sets of both, B and Bs decays. Semileptonic decays B(s) -> X l nu (l = electron or muon) constitute approximately one fifth of the total decay width of B(s) mesons and play an important role in the determination of the CKM matrix elements V_ub and V_cb. Recent results from Belle are presented, including the study of B- -> Ds(*) K l nu, the first measurements of semi-inclusive modes B -> D(*) X l nu and the measurement of the inclusive branching fraction Bf(Bs -> X l nu).
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