Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Measurement of differential distributions of B → D*$$\ell\bar{v}_{\ell}$$ and implications on |Vcb|

Journal Article · · Physical Review. D.
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
We present a measurement of the differential shapes of exclusive B → D*$$\ell\bar{v}_{\ell}$$ (B = B-, $$\bar{B}$$0 and $$\ell$$ = e, μ) 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 |Vcb|CLN = (40.2 ± 0.9) x 10-3 and |Vcb|BGL = (40.7 ± 1.0) x 10-3 with the zero-recoil lattice QCD point $$\mathcal{F}$$(1) = 0.906 ± 0.013. We also perform a study of the impact of beyond zero-recoil lattice QCD calculations on the |Vcb| determinations. Additionally, we present the lepton-flavor universality ratio Reμ = $$\mathcal{B}$$(B → D*e$$\bar{v}$$e)/$$\mathcal{B}$$(B → D*μ$$\bar{v}$$μ) = 0.993 ± 0.023 ± 0.023, the electron and muon forwardbackward asymmetry and their difference ΔAFB = 0.028 ± 0.028 ± 0.008, and the electron and muon D* longitudinal polarization fraction and their difference ΔF$$^{D*}_L$$ = 0.030 ± 0.025 ± 0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
Contributing Organization:
The Belle Collaboration
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2424163
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 108; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (47)

Power-enhanced leading-logarithmic QED corrections to Bq→ μ+μ− journal October 2019
First extraction of inclusive Vcb from q2 moments journal October 2022
FastBDT: A Speed-Optimized Multivariate Classification Algorithm for the Belle II Experiment journal September 2017
B2BII: Data Conversion from Belle to Belle II journal November 2018
The Belle II Core Software: Belle II Framework Software Group journal November 2018
The Full Event Interpretation: An Exclusive Tagging Algorithm for the Belle II Experiment journal February 2019
Minuit - a system for function minimization and analysis of the parameter errors and correlations journal December 1975
Photos — a universal Monte Carlo for QED radiative corrections in decays journal July 1991
Clarification of the use of CHI-square and likelihood functions in fits to histograms journal April 1984
On the use of the covariance matrix to fit correlated data journal July 1994
Model-independent determinations of form factors journal February 1996
The EvtGen particle decay simulation package journal April 2001
The Belle detector
  • Abashian, A.; Gotow, K.; Morgan, N.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1 https://doi.org/10.1016/S0168-9002(01)02013-7
journal February 2002
Electron identification in Belle
  • Hanagaki, K.; Kakuno, H.; Ikeda, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 485, Issue 3 https://doi.org/10.1016/S0168-9002(01)02113-1
journal June 2002
Muon identification in the Belle experiment at KEKB
  • Abashian, A.; Abe, K.; Abe, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 491, Issue 1-2 https://doi.org/10.1016/S0168-9002(02)01164-6
journal September 2002
Overview of the KEKB accelerators journal February 2003
A measurement of the branching fraction for the inclusive B→Xsγ decays with the Belle detector journal July 2001
Dispersive bounds on the shape of form factors journal October 1998
Global decay chain vertex fitting at Belle II
  • Krohn, J. -F.; Tenchini, F.; Urquijo, P.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 976 https://doi.org/10.1016/j.nima.2020.164269
journal October 2020
A fresh look at the determination of | V cb | from B → D ⁎ lν journal June 2017
Model-independent extraction of |V| from B ¯ → D ⁎ ℓ ν ‾ journal August 2017
Three loop calculations and inclusive V journal November 2021
Analysis of B c → τν τ at CEPC * journal February 2021
Review of Particle Physics journal August 2022
Physics achievements from the Belle experiment journal January 2012
Achievements of KEKB journal January 2013
N = 5 , 6, 7, 8: Nested hypothesis tests and truncation dependence of | V c b | journal July 2019
Measurement of the CKM matrix element | V c b | from B 0 → D * − ℓ + ν ℓ at Belle journal September 2019
Revisiting fits to B 0 → D * − ℓ + ν ℓ to measure | V c b | with novel methods and preliminary LQCD data at nonzero recoil journal April 2021
Erratum: Measurement of the CKM matrix element | V c b | from B 0 → D * − ℓ + ν ℓ at Belle [Phys. Rev. D 100 , 052007 (2019)] journal April 2021
Loop-induced determinations of Vub and Vcb journal February 2022
Constrained second-order power corrections in HQET: R(D(*)) , |Vcb| , and new physics journal November 2022
Averages of b -hadron, c -hadron, and τ -lepton properties as of 2021 journal March 2023
Search for exclusive charmless hadronic B decays journal February 1996
Precision corrections to dispersive bounds on form factors journal December 1997
Update of | V c b | from the B ¯ → D * ℓ ν ¯ form factor at zero recoil with three-flavor lattice QCD journal June 2014
Measurement of the decay B → D ℓ ν ℓ in fully reconstructed events and determination of the Cabibbo-Kobayashi-Maskawa matrix element | V c b | journal February 2016
Semileptonic B ( s ) decays to excited charmed mesons with e , μ , τ and searching for new physics with R ( D * * ) journal January 2017
Measurement of time-dependent C P asymmetries in B 0 → K S 0 η γ decays journal May 2018
Unitary Symmetry and Leptonic Decays journal June 1963
B s , d → ℓ + ℓ − in the Standard Model with Reduced Theoretical Uncertainty journal March 2014
Observables for the Analysis of Event Shapes in e + e − Annihilation and Other Processes journal December 1978
Measurement of Branching Fractions for B → π π , K π , and KK Decays journal August 2001
Semitauonic b -hadron decays: A lepton flavor universality laboratory journal February 2022
Lepton-flavour non-universality of $${\bar{B}}\rightarrow D^*\ell {{\bar{\nu }}}$$ angular distributions in and beyond the Standard Model journal November 2021
Semileptonic form factors for $$B\rightarrow D^*\ell \nu $$ at nonzero recoil from $$2+1$$-flavor lattice QCD journal December 2022
C P -Violation in the Renormalizable Theory of Weak Interaction journal February 1973

Similar Records

Measurements of the Semileptonic Decays \Bb\to D\ell\nub and \Bb\to D^*\ell\nub Using a Global Fit to D X\ell\nub Final States
Journal Article · Thu Aug 28 00:00:00 EDT 2008 · Physical Review D · OSTI ID:937180
Measurement of |V{sub cb}| using {bar B}{sup 0} {yields} D*{sup +}{ell}{sup -}{bar {nu}}{sub {ell}} Decays
Technical Report · Mon Aug 11 20:00:00 EDT 2003 · OSTI ID:815252

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Cabibbo-Kobayashi-Maskawa matrix
form factors
leptonic & semileptonic & radiative decays