Measurement of differential distributions of B→D*ℓν¯ℓ and implications on
M. T. Prim,F. U. Bernlochner,F. Metzner,K. Lieret,T. Kuhr,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,S. Bahinipati,S. Banerjee,M. Bauer,P. K. Behera,J. V. Bennett,M. Bessner,V. Bhardwaj,B. Bhuyan,T. Bilka,D. Biswas,D. Bodrov,J. Borah,A. Bożek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,L. Cao,D. Červenkov,M. C. Chang,V. Chekelian,B. G. Cheon,K. Chilikin,H. E. Cho,Kihyeon Cho,Y. Choi,S. Choudhury,D. Cinabro,S. Das,N. Dash,G. de Marino,G. De Nardo,G. De Pietro,R. Dhamija,F. Di Capua,J. Dingfelder,Z. Doležal,T. V. Dong,D. Epifanov,T. Ferber,D. Ferlewicz,A. Frey,B. G. Fulsom,V. Gaur,A. Garmash,A. Giri,P. Goldenzweig,E. Graziani,T. Gu,K. Gudkova,C. Hadjivasiliou,S. Halder,T. Hara,K. Hayasaka,H. Hayashii,M. T. Hedges,D. Herrmann,M. Hernández Villanueva,C.-L. Hsu,T. Iijima,K. Inami,G. Inguglia,N. Ipsita,A. Ishikawa,R. Itoh,M. Iwasaki,W. W. Jacobs,E.-J. Jang,S. Jia,Y. Jin,K. K. Joo,A. B. Kaliyar,K. H. Kang,T. Kawasaki,C. Kiesling,C. H. Kim,D. Y. Kim,K.-H. Kim,Y.-K. Kim,K. Kinoshita,P. Kodyš,T. Konno,A. Korobov,S. Korpar,E. Kovalenko,P. Križan,P. Krokovny,M. Kumar,Rajeev Kumar,K. Kumara,A. Kuzmin,Y. J. Kwon,K. Lalwani,J. S. Lange,M. Laurenza,Seungcheol Lee,P. Lewis,J. Li,L. K. Li,Y. Li,J. Libby,Y.-R. Lin,D. Liventsev,T. Luo,M. Masuda,T. Matsuda,D. Matvienko,S. K. Maurya,F. Meier,M. Merola,K. Miyabayashi,R. Mizuk,G. B. Mohanty,I. Nakamura,M. Nakao,Z. Natkaniec,A. Natochii,L. Nayak,N. K. Nisar,S. Nishida,K. Ogawa,S. Ogawa,H. Ono,P. Oskin,P. Pakhlov,G. Pakhlova,T. Pang,S. Pardi,H. Park,J. Park,S.-H. Park,A. Passeri,S. Paul,T. K. Pedlar,R. Pestotnik,L. E. Piilonen,T. Podobnik,E. Prencipe,A. Rabusov,M. Röhrken,A. Rostomyan,N. Rout,G. Russo,S. Sandilya,A. Sangal,L. Šantelj,V. Savinov,G. Schnell,C. Schwanda,A. J. Schwartz,Y. Seino,K. Senyo,M. E. Sevior,W. Shan,M. Shapkin,C. Sharma,J. G. Shiu,B. Shwartz,F. Simon,A. Soffer,A. Sokolov,E. Solovieva,M. Starič,M. Sumihama,T. Sumiyoshi,M. Takizawa,U. Tamponi,K. Tanida,F. Tenchini,K. Trabelsi,T. Uglov,Y. Unno,S. Uno,P. Urquijo,Y. Usov,S. Vahsen,R. Van Tonder,G. Varner,K. E. Varvell,A. Vinokurova,A. Vossen,E. Waheed,D. Wang,M.-Z. Wang,M. Watanabe,S. Watanuki,E. Won,B. Yabsley,W. B. Yan,S. B. Yang,J. Yelton,Y. Yook,C. Z. Yuan,Yuan Li,Y. Yusa,Y. Zhai,Z. P. Zhang,V. Zhilich,V. Zhukova
Physical review（2023）
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摘要
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.8 MoreReceived 23 January 2023Accepted 5 May 2023DOI:https://doi.org/10.1103/PhysRevD.108.012002Published by the American Physical Society under the terms of the 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.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasForm factorsLeptonic, semileptonic & radiative decaysParticles & Fields
