High Energy / Nuclear Theory / RIKEN Seminars

[HET seminar] Theory and experimental developments in inclusive Vcb

Name: [HET seminar] Theory and experimental developments in inclusive Vcb
Start: 2022-01-13T11:00:00-05:00
End: 2022-01-13T12:30:00-05:00
Location: https://bnl.zoomgov.com/j/1612154637?pwd=Z2E5RWhqRXBkMnExQzc3eVBTWTg3UT09

by Matteo Fael

Thursday 13 Jan 2022, 11:00 → 12:30 US/Eastern

https://bnl.zoomgov.com/j/1612154637?pwd=Z2E5RWhqRXBkMnExQzc3eVBTWTg3UT09

Description

Precise determinations of |Vcb| from B factories are crucial for testing the unitarity of the CKM matrix and obtaining accurate predictions of decay processes with flavor changing neutral current. Inclusive semileptonic B decays offer one of the main avenues for such |Vcb| extraction. In this seminar I will present some recent developments in the theoretical prediction of this class of decays, in particular the calculation performed in perturbative QCD of the third order correction to the partial semileptonic width and the relation between the on-shell mass and the so-called kinetic mass determined to the same order of accuracy. I will also discuss the perspectives for a novel extraction of inclusive |Vcb| based on the leptonic invariant mass spectrum, recently measured by the Belle collaboration, which allows to reduce the set of non-perturbative inputs necessary in the theoretical prediction.