Abstract
We present the first determination of V cb from inclusive B→ X cℓ v¯ ℓ using moments of the dilepton invariant mass, q 2. These moments are reparametrization invariant quantities and depend on a reduced set of non-perturbative parameters. This reduced set of parameters opens a new path to extract these parameters up to 1/mb4 purely from data and can potentially reduce the uncertainty on V cb. In this paper, we present our first determination of V cb using this method. Combining the recent measurements of q 2 moments by Belle and Belle II, our default fit gives |V cb| = (41.69±0.63)·10 −3. This result presents an important independent cross check of, and is consistent with, the previous state-of-the-art inclusive determinations using lepton energy and hadronic invariant mass moments.
Original language | English |
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Article number | 68 |
Number of pages | 34 |
Journal | Journal of High Energy Physics |
Volume | 2022 |
Issue number | 10 |
DOIs | |
Publication status | Published - 10 Oct 2022 |
Keywords
- CKM Parameters
- Semi-Leptonic Decays
- SEMILEPTONIC-B
- HEAVY-QUARK
- POLE MASS
- DECAYS
- (B)OVER-BAR
- RUNDEC
- QCD