Determination of |Vcb| using (B)over-bar0 RIGHTWARDS ARROW D*+ l-(ν)over-barl decays with Belle II
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476865" target="_blank" >RIV/00216208:11320/23:10476865 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=eSFiz2Rh7C" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=eSFiz2Rh7C</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.108.092013" target="_blank" >10.1103/PhysRevD.108.092013</a>
Alternative languages
Result language
angličtina
Original language name
Determination of |Vcb| using (B)over-bar0 RIGHTWARDS ARROW D*+ l-(ν)over-barl decays with Belle II
Original language description
We determine the Cabibbo-Kobayashi-Maskawa matrix-element magnitude vertical bar V-cb vertical bar using (B) over bar (0) -> D*(+)l(-)(nu) over bar (l) decays reconstructed in 189 fb(-1) of collision data collected by the Belle II experiment, located at the SuperKEKB e(+)e(-) collider. Partial decay rates are reported as functions of the recoil parameter w and three decay angles separately for electron and muon final states. We obtain vertical bar V-cb vertical bar using the Boyd-Grinstein-Lebed and Caprini-Lellouch-Neubert parametrizations, and find vertical bar V-cb vertical bar(BGL) = (40.57 +/- 0.31 +/- 0.95 +/- 0.58) x 10(-3) and vertical bar V-cb vertical bar(CLN) = (40.13 +/- 0.27 +/- 0.93 +/- 0.58) x 10(-3) with the uncertainties denoting statistical components, systematic components, and components from the lattice QCD input, respectively. The branching fraction is measured to be B((B) over bar (0) -> D*(+)l(-)(nu) over bar (l)) = (4.922 +/- 0.023 +/- 0.220)%. The ratio of branching fractions for electron and muon final states is found to be 0.998 +/- 0.009 +/- 0.020. In addition, we determine the forward-backward angular asymmetry and the D*(+) longitudinal polarization fractions. All results are compatible with lepton-flavor universality in the Standard Model.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Volume of the periodical
108
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
092013
UT code for WoS article
001143866800001
EID of the result in the Scopus database
2-s2.0-85179606421