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 Belle data set of 711fb−1 integrated luminosity. 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=(40.1±0.9)×10−3 and |Vcb|BGL=(40.6±0.9)×10−3 with the zero-recoil lattice QCD point F(1)=0.906±0.013. We also perform a study of the impact of preliminary 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)=0.990±0.021±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.022±0.026±0.007, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFD∗L=0.034±0.024±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

Measurement of differential distributions of B→D*ℓν¯ℓ and implications on |Vcb|

Tenchini, F.;
2023-01-01

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 Belle data set of 711fb−1 integrated luminosity. 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=(40.1±0.9)×10−3 and |Vcb|BGL=(40.6±0.9)×10−3 with the zero-recoil lattice QCD point F(1)=0.906±0.013. We also perform a study of the impact of preliminary 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)=0.990±0.021±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.022±0.026±0.007, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFD∗L=0.034±0.024±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.
2023
Prim, M.  T.; Bernlochner, F.; Metzner, F.; Lieret, K.; Kuhr, T.; Adachi, I.; Aihara, H.; Said, S. Al; Asner, D.  M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Banerjee, Sw.; Bauer, M.; Behera, P.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bodrov, D.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Browder, T.  E.; Budano, A.; Campajola, M.; Cao, L.; Červenkov, D.; Chang, M. -C.; Chekelian, V.; Cheon, B.  G.; Chilikin, K.; Cho, H.  E.; Cho, K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Das, S.; Dash, N.; de Marino, G.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Dong, T.  V.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Frey, A.; Fulsom, B.  G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Gudkova, K.; Hadjivasiliou, C.; Halder, S.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M.  T.; Herrmann, D.; Hernández Villanueva, M.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W.  W.; Jang, E. -J.; Jia, S.; Jin, Y.; Joo, K.  K.; Kaliyar, A.  B.; Kang, K.  H.; Kawasaki, T.; Kiesling, C.; Kim, C.  H.; Kim, D.  Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kodyš, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Krokovny, P.; Kumar, M.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lalwani, K.; Lange, J.  S.; Laurenza, M.; Lee, S.  C.; Lewis, P.; Li, J.; Li, L.  K.; Li, Y.; Libby, J.; Lin, Y. -R.; Liventsev, D.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Maurya, S.  K.; Meier, F.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G.  B.; Nakamura, I.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nisar, N.  K.; Nishida, S.; Ogawa, K.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pang, T.; Pardi, S.; Park, H.; Park, J.; Park, S. -H.; Passeri, A.; Paul, S.; Pedlar, T.  K.; Pestotnik, R.; Piilonen, L.  E.; Podobnik, T.; Prencipe, E.; Rabusov, A.; Röhrken, M.; Rostomyan, A.; Rout, N.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Schwartz, A.  J.; Seino, Y.; Senyo, K.; Sevior, M.  E.; Shan, W.; Shapkin, M.; Sharma, C.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Soffer, A.; Sokolov, A.; Solovieva, E.; Starič, M.; Sumihama, M.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, S.  E.; van Tonder, R.; Varner, G.; Varvell, K.  E.; Vinokurova, A.; Vossen, A.; Waheed, E.; Wang, D.; Wang, M. -Z.; Watanabe, M.; Watanuki, S.; Won, E.; Yabsley, B.  D.; Yan, W.; Yang, S.  B.; Yelton, J.; Yook, Y.; Yuan, C.  Z.; Yuan, L.; Yusa, Y.; Zhai, Y.; Zhang, Z.  P.; Zhilich, V.; Zhukova, V.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1216625
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