First Simultaneous Determination of Inclusive and Exclusive jVubj

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

First Simultaneous Determination of Inclusive and Exclusive jVubj

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

First Simultaneous Determination of Inclusive and Exclusive jVubj

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA22-18469S" target="_blank" >GA22-18469S: Studium jevů za Standardním modelem ve flavor sektoru na experimentu Belle II</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

131

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

211801

Kód UT WoS článku

001178898900001

EID výsledku v databázi Scopus

2-s2.0-85178489712