Measurement of differential distributions of B →d∗ℓ ν ¯ ℓ and implications on |Vcb |

The Belle collaboration

doi:10.1103/PhysRevD.108.012002

Measurement of differential distributions of B →d∗ℓ ν ¯ ℓ and implications on |Vcb |

The Belle collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We present a measurement of the differential shapes of exclusive B→D∗ℓν¯ℓ (B=B-,B¯0 and ℓ=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)×10-3 and |Vcb|BGL=(40.7±1.0)×10-3 with the zero-recoil lattice QCD point 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=B(B→D∗eν¯e)/B(B→D∗μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFLD∗=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

Original language	English
Article number	012002
Number of pages	21
Journal	Physical Review D
Volume	108
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.108.012002
State	Published - 1 Jul 2023

Funding

Funders	Funder number
Basque Foundation for Science, Spain
Excellence Cluster Universe
Key Research Program of Frontier Sciences
Radiation Science Research Institute
National Science Foundation
U.S. Department of Energy
Carl-Zeiss-Stiftung
University of Tabuk	S-1440-0321, S-0256-1438, S-0280-1439
University of Tabuk
Horizon 2020 Framework Programme	884719
Horizon 2020 Framework Programme
European Commission	947006
European Commission
Australian Research Council	DP170102204, DP180102629, DP150103061, DE220100462, DP170102389, FT130100303
Australian Research Council
Department of Science and Technology, Ministry of Science and Technology, India
Department of Atomic Energy, Government of India	RTI 4002
Department of Atomic Energy, Government of India
Deutsche Forschungsgemeinschaft	BE 6075/1-1
Deutsche Forschungsgemeinschaft
Volkswagen Foundation
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
National Natural Science Foundation of China	12175041, 12135005, 11975076, 12161141008, 11675166, 11705209
National Natural Science Foundation of China
Ministerstvo Školství, Mládeže a Tělovýchovy	LTT17020
Ministerstvo Školství, Mládeže a Tělovýchovy
Grantová Agentura České Republiky	22-18469S
Grantová Agentura České Republiky
Bundesministerium für Bildung und Forschung	05H21PDKBA
Bundesministerium für Bildung und Forschung
Chinese Academy of Sciences	ZR2022JQ02, QYZDJ-SSW-SLH011
Chinese Academy of Sciences
Austrian Science Fund	P 31361-N36
Austrian Science Fund
Ministry of Education
Ministry of Education and Science of the Russian Federation
Korea Institute of Science and Technology Information
National Research Foundation of Korea	2022R1A2C1003993, 2016R1D1A1B02012900, 2018R1A2B3003643, RS202200197659, 2021R1A6A1A03043957, 2021R1F1A1064008, 2019R1I1A3A01058933, 2021R1F1A1060423, 2018R1A6A1A06024970
National Research Foundation of Korea
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum Nauki
Javna Agencija za Raziskovalno Dejavnost RS	J1-9124, P1-0135
Javna Agencija za Raziskovalno Dejavnost RS
Ministerstwo Edukacji i Nauki
Ministry of Science and Technology, Taiwan
Nagoya University
Natural Science Foundation of Shandong Province
National Research University Higher School of Economics
Rheinische Friedrich-Wilhelms-Universität Bonn
Bundesministerium für Bildung, Wissenschaft und Forschung
Korea Research Environment Open Network

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10.1103/PhysRevD.108.012002

Cite this

@article{fba6fbb3e9254dbdbc8a0ae2f82e61f2,

title = "Measurement of differential distributions of B →d∗ℓ ν ¯ ℓ and implications on |Vcb |",

abstract = "We present a measurement of the differential shapes of exclusive B→D∗ℓν¯ℓ (B=B-,B¯0 and ℓ=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)×10-3 and |Vcb|BGL=(40.7±1.0)×10-3 with the zero-recoil lattice QCD point 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=B(B→D∗eν¯e)/B(B→D∗μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFLD∗=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.",

author = "{The Belle collaboration} and Prim, {M. T.} and F. Bernlochner and F. Metzner and K. Lieret and T. Kuhr and I. Adachi and H. Aihara and Said, {S. Al} and Asner, {D. M.} and H. Atmacan and V. Aulchenko and T. Aushev and R. Ayad and V. Babu and S. Bahinipati and Sw Banerjee and M. Bauer and P. Behera and J. Bennett and M. Bessner and V. Bhardwaj and B. Bhuyan and T. Bilka and D. Biswas and D. Bodrov and J. Borah and A. Bozek and M. Bra{\v c}ko and P. Branchini and Browder, {T. E.} and A. Budano and M. Campajola and L. Cao and D. {\v C}ervenkov and Chang, {M. C.} and V. Chekelian and Cheon, {B. G.} and K. Chilikin and Cho, {H. E.} and K. Cho and Y. Choi and S. Choudhury and D. Cinabro and S. Das and N. Dash and {De Marino}, G. and {De Nardo}, G. and {De Pietro}, G. and R. Dhamija and A. Soffer",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2023",

month = jul,

day = "1",

doi = "10.1103/PhysRevD.108.012002",

language = "אנגלית",

volume = "108",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "1",

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TY - JOUR

T1 - Measurement of differential distributions of B →d∗ℓ ν ¯ ℓ and implications on |Vcb |

AU - The Belle collaboration

AU - Prim, M. T.

AU - Bernlochner, F.

AU - Metzner, F.

AU - Lieret, K.

AU - Kuhr, T.

AU - Adachi, I.

AU - Aihara, H.

AU - Said, S. Al

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Bahinipati, S.

AU - Banerjee, Sw

AU - Bauer, M.

AU - Behera, P.

AU - Bennett, J.

AU - Bessner, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswas, D.

AU - Bodrov, D.

AU - Borah, J.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Browder, T. E.

AU - Budano, A.

AU - Campajola, M.

AU - Cao, L.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chekelian, V.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Das, S.

AU - Dash, N.

AU - De Marino, G.

AU - De Nardo, G.

AU - De Pietro, G.

AU - Dhamija, R.

AU - Soffer, A.

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2023/7/1

Y1 - 2023/7/1

N2 - We present a measurement of the differential shapes of exclusive B→D∗ℓν¯ℓ (B=B-,B¯0 and ℓ=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)×10-3 and |Vcb|BGL=(40.7±1.0)×10-3 with the zero-recoil lattice QCD point 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=B(B→D∗eν¯e)/B(B→D∗μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFLD∗=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

AB - We present a measurement of the differential shapes of exclusive B→D∗ℓν¯ℓ (B=B-,B¯0 and ℓ=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)×10-3 and |Vcb|BGL=(40.7±1.0)×10-3 with the zero-recoil lattice QCD point 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=B(B→D∗eν¯e)/B(B→D∗μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFLD∗=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

UR - http://www.scopus.com/inward/record.url?scp=85165042811&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.108.012002

DO - 10.1103/PhysRevD.108.012002

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AN - SCOPUS:85165042811

SN - 2470-0010

VL - 108

JO - Physical Review D

JF - Physical Review D

IS - 1

M1 - 012002

ER -

Measurement of differential distributions of B →d∗ℓ ν ¯ ℓ and implications on |Vcb |

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