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Measurement of lepton mass squared moments in B → Xcl(ν)over-barl decays with the Belle II experiment

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476829" target="_blank" >RIV/00216208:11320/23:10476829 - isvavai.cz</a>

  • Result on the web

    <a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GL6OgjZX8T" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GL6OgjZX8T</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevD.107.072002" target="_blank" >10.1103/PhysRevD.107.072002</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Measurement of lepton mass squared moments in B → Xcl(ν)over-barl decays with the Belle II experiment

  • Original language description

    We present measurements of the first to fourth moments of the lepton mass squared q(2) of B -&gt; X(c)l (nu) over bar (l) decays for l = e, mu and with X-c a hadronic system containing a charm quark. These results use a sample of electron-positron collisions at the Upsilon(4S) resonance corresponding to 62.8 fb(-1) of integrated luminosity and collected by the Belle II 2 experiment in 2019 and 2020. To identify the X-c system and reconstruct q(2), one of the B mesons from an Upsilon(4S) -&gt; B (B) over bar decay is fully reconstructed in a hadronic decay mode using a multivariate B tagging algorithm. We report raw and central moments for q(2) &gt; 1.5 GeV2/c(4) up to q(2) &gt; 8.5 GeV2/c(4), probing up to 77% of the accessible B -&gt; X(c)l (nu) over bar (l) phase space. This is the first measurement of moments in the experimentally challenging range of [1.5, 2.5] GeV2/c(4). The results can be used for a new determination of vertical bar V-cb vertical bar using inclusive B -&gt; X(c)l (nu) over bar (l) decays.

  • Czech name

  • Czech description

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

    107

  • Issue of the periodical within the volume

    7

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    24

  • Pages from-to

    072002

  • UT code for WoS article

    001021729500001

  • EID of the result in the Scopus database

    2-s2.0-85152957979