Determination of |Vcb| using B¯0→D*+ℓ−ν¯ℓ decays with Belle II

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dc.contributor.authorAdachi, I.en
dc.contributor.authorAggarwal, L.en
dc.contributor.authorAhmed, H.en
dc.contributor.authorAihara, H.en
dc.contributor.authorAkopov, N.en
dc.contributor.authorAloisio, A.en
dc.contributor.authorAnh Ky, N.en
dc.contributor.authorAsner, D. M.en
dc.contributor.authorAtmacan, H.en
dc.contributor.authorAushev, T.en
dc.contributor.authorAushev, V.en
dc.contributor.authorAversano, M.en
dc.contributor.authorBabu, V.en
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dc.contributor.authorBahinipati, S.en
dc.contributor.authorBambade, P.en
dc.contributor.authorBanerjee, Swen
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dc.contributor.authorBaudot, J.en
dc.contributor.authorBauer, M.en
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dc.contributor.authorBeaubien, A.en
dc.contributor.authorBecherer, F.en
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dc.contributor.authorBozek, A.en
dc.contributor.authorBračko, M.en
dc.contributor.authorBranchini, P.en
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dc.contributor.authorBudano, A.en
dc.contributor.authorBussino, S.en
dc.contributor.authorCampajola, M.en
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dc.date.accessioned2023-12-08T18:22:39Zen
dc.date.available2023-12-08T18:22:39Zen
dc.date.issued2023-11en
dc.date.issued2023-11-29en
dc.description.abstractWe determine the Cabibbo-Kobayashi-Maskawa matrix-element magnitude |V<sub>cb</sub>| using B<sup>0</sup> → D<sup>∗+</sup>ℓ<sup>−</sup>ν<sub>ℓ</sub> decays reconstructed in 189 fb<sup>−1</sup> of collision data collected by the Belle II experiment, located at the SuperKEKB e<sup>+</sup> e<sup>−</sup> 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 |V<sub>cb</sub>| using the Boyd-Grinstein-Lebed and Caprini-Lellouch-Neubert parametrizations, and find |V<sub>cb</sub>|<sub>BGL</sub> = (40.57±0.31±0.95±0.58)×10<sup>−3</sup> and |V<sub>cb</sub>|<sub>CLN</sub> = (40.13±0.27±0.93±0.58)× <sup>−3</sup> with the uncertainties denoting statistical components, systematic components, and components from the lattice QCD input, respectively. The branching fraction is measured to be β(B<sup>0</sup> → D<sup>∗+</sup> ℓ<sup>−</sup> ν<sub>ℓ</sub>) = (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<sup>∗+</sup> longitudinal polarization fractions. All results are compatible with lepton-flavor universality in the Standard Model.en
dc.description.versionPublished online versionen
dc.identifier092013 (Article number)en
dc.identifier.doihttps://doi.org/10.1103/physrevd.108.092013en
dc.identifier.eissn2470-0029en
dc.identifier.issn2470-0010en
dc.identifier.issue9en
dc.identifier.orcidPiilonen, Leo [0000-0001-6836-0748]en
dc.identifier.urihttps://hdl.handle.net/10919/117156en
dc.identifier.volume108en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttp://dx.doi.org/10.1103/physrevd.108.092013en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject5107 Particle and High Energy Physicsen
dc.subject4902 Mathematical Physicsen
dc.subject49 Mathematical Sciencesen
dc.subject51 Physical Sciencesen
dc.subject5101 Astronomical Sciencesen
dc.titleDetermination of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">|</mml:mo><mml:msub><mml:mi>V</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mi>b</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">|</mml:mo></mml:math> using <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo>*</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup><mml:msub><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mo>ℓ</mml:mo></mml:msub></mml:math> decays with Belle IIen
dc.title.serialPhysical Review Den
dc.typeArticle - Refereeden
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pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/Physicsen
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