First Simultaneous Determination of Inclusive and Exclusive jVubj

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476475" target="_blank" >RIV/00216208:11320/23:10476475 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.FsReOC6Ra" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.FsReOC6Ra</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.131.211801" target="_blank" >10.1103/PhysRevLett.131.211801</a>

Result language
angličtina
Original language name
First Simultaneous Determination of Inclusive and Exclusive jVubj
Original language description
The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrixelement Vub using inclusive and exclusive decays is performed with the full Belle data set at the ϒð4SÞresonance, corresponding to an integrated luminosity of 711 fb-1.We analyze collision events in which oneB meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic Xusystem of the semileptonic b RIGHTWARDS ARROW ul-νl decay. We separate exclusive B RIGHTWARDS ARROW πl-νl decays from other inclusiveB RIGHTWARDS ARROW Xul-νl and backgrounds with a two-dimensional fit that utilizes the number of charged pions in the Xusystem and the four-momentum transfer q2 between the B and Xu systems. Combining our measurementwith information from lattice QCD and QCD calculations of the inclusive partial rate as well as externalexperimental information on the shape of the B RIGHTWARDS ARROW πl-νl form factor, we determine jVexclubj 1/4 ð3.780.23 0.16 0.14Þ x 10-3 and jVinclubj 1/4 ð3.88 0.20 0.31 0.09Þ x 10-3, respectively, with theuncertainties being the statistical error, systematic errors, and theory errors. The ratio of jVexclubj=jVinclubj 1/40.97 0.12 is compatible with unity.
Czech name
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Czech description
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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

Project
<a href="/en/project/GA22-18469S" target="_blank" >GA22-18469S: Studies of the Beyond Standard Model phenomena in the flavor sector with the Belle II Experiment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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