Research output: Contribution to journal › Article › peer-review
Measurement of the decay B →dℓνℓ in fully reconstructed events and determination of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb |. / The BELLE collaboration.
In: Physical Review D, Vol. 93, No. 3, 032006, 25.02.2016.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Measurement of the decay B →dℓνℓ in fully reconstructed events and determination of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb |
AU - The BELLE collaboration
AU - Glattauer, R.
AU - Schwanda, C.
AU - Abdesselam, A.
AU - Adachi, I.
AU - Adamczyk, K.
AU - Aihara, H.
AU - Al Said, S.
AU - Asner, D. M.
AU - Aushev, T.
AU - Ayad, R.
AU - Aziz, T.
AU - Badhrees, I.
AU - Bakich, A. M.
AU - Bansal, V.
AU - Barberio, E.
AU - Bhuyan, B.
AU - Biswal, J.
AU - Bonvicini, G.
AU - Bozek, A.
AU - Bračko, M.
AU - Breibeck, F.
AU - Browder, T. E.
AU - Červenkov, D.
AU - Chekelian, V.
AU - Chen, A.
AU - Cheon, B. G.
AU - Chilikin, K.
AU - Chistov, R.
AU - Cho, K.
AU - Chobanova, V.
AU - Choi, Y.
AU - Cinabro, D.
AU - Dalseno, J.
AU - Danilov, M.
AU - Dash, N.
AU - Dingfelder, J.
AU - DoleŽal, Z.
AU - Eidelman, S.
AU - Gabyshev, N.
AU - Garmash, A.
AU - Krokovny, P.
AU - Kuzmin, A.
AU - Lukin, P.
AU - Matvienko, D.
AU - Shebalin, V.
AU - Shwartz, B.
AU - Usov, Y.
AU - Vorobyev, V.
AU - Zhilich, V.
AU - Zhulanov, V.
PY - 2016/2/25
Y1 - 2016/2/25
N2 - We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| using the decay B→Dℓνℓ (ℓ=e,μ) based on 711 fb-1 of e+e-→ (4S) data recorded by the Belle detector and containing 772×106 BB¯ pairs. One B meson in the event is fully reconstructed in a hadronic decay mode, while the other, on the signal side, is partially reconstructed from a charged lepton and either a D+ or D0 meson in a total of 23 hadronic decay modes. The isospin-averaged branching fraction of the decay B→Dℓνℓ is found to be B(B0→D-ℓ+νℓ)=(2.31±0.03(stat)±0.11(syst))%. Analyzing the differential decay rate as a function of the hadronic recoil with the parametrization of Caprini, Lellouch, and Neubert and using the form-factor prediction G(1)=1.0541±0.0083 calculated by FNAL/MILC, we obtain ηEW|Vcb|=(40.12±1.34)×10-3, where ηEW is the electroweak correction factor. Alternatively, assuming the model-independent form-factor parametrization of Boyd, Grinstein, and Lebed and using lattice QCD data from the FNAL/MILC and HPQCD collaborations, we find ηEW|Vcb|=(41.10±1.14)×10-3.
AB - We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| using the decay B→Dℓνℓ (ℓ=e,μ) based on 711 fb-1 of e+e-→ (4S) data recorded by the Belle detector and containing 772×106 BB¯ pairs. One B meson in the event is fully reconstructed in a hadronic decay mode, while the other, on the signal side, is partially reconstructed from a charged lepton and either a D+ or D0 meson in a total of 23 hadronic decay modes. The isospin-averaged branching fraction of the decay B→Dℓνℓ is found to be B(B0→D-ℓ+νℓ)=(2.31±0.03(stat)±0.11(syst))%. Analyzing the differential decay rate as a function of the hadronic recoil with the parametrization of Caprini, Lellouch, and Neubert and using the form-factor prediction G(1)=1.0541±0.0083 calculated by FNAL/MILC, we obtain ηEW|Vcb|=(40.12±1.34)×10-3, where ηEW is the electroweak correction factor. Alternatively, assuming the model-independent form-factor parametrization of Boyd, Grinstein, and Lebed and using lattice QCD data from the FNAL/MILC and HPQCD collaborations, we find ηEW|Vcb|=(41.10±1.14)×10-3.
UR - http://www.scopus.com/inward/record.url?scp=84960540286&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.93.032006
DO - 10.1103/PhysRevD.93.032006
M3 - Article
VL - 93
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 3
M1 - 032006
ER -
ID: 18171151