Measurement of differential distributions of B. D l.l and implications on Vcb

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476779" target="_blank" >RIV/00216208:11320/23:10476779 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=KUubt1KJ6_" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=KUubt1KJ6_</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.108.012002" target="_blank" >10.1103/PhysRevD.108.012002</a>

Result language
angličtina
Original language name
Measurement of differential distributions of B. D l.l and implications on Vcb
Original language description
We present a measurement of the differential shapes of exclusive B -D*l & nu; over bar l (B = B-; B over bar 0 and l = e, is) decays with hadronic tag-side reconstruction for the full 711 fb-1 Belle dataset. We extract the Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parameters and use an external input for the absolute branching fractions to determine the Cabibbo-Kobayashi-Maskawa matrix element and find IVcbICLN = (40.2 & PLUSMN; 0.9) x 10-3 and IVcbIBGL = (40.7 & PLUSMN; 1.0) x 10-3 with the zero-recoil lattice QCD point F(1) = 0.906 & PLUSMN; 0.013. We also perform a study of the impact of beyond zero-recoil lattice QCD calculations on the IVcbI determinations. Additionally, we present the lepton-flavor universality ratio Reis = B(B -D*e & nu; over bar e)=B(B -D*is & nu; over bar is) = 0.993 & PLUSMN; 0.023 & PLUSMN; 0.023, the electron and muon forward -backward asymmetry and their difference & UDelta;AFB = 0.028 & PLUSMN; 0.028 & PLUSMN; 0.008, and the electron and muon D* longitudinal polarization fraction and their difference & UDelta;FD*L = 0.030 & PLUSMN; 0.025 & PLUSMN; 0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.
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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