Measurement of Angular Coefficients of B ¯ → D * ℓ ν ¯ ℓ : Implications for | V c b | and Tests of Lepton Flavor Universality

Prim, M. T.; Bernlochner, F.; Metzner, F.; Aihara, H.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Banerjee, Sw.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bodrov, D.; Bondar, A.; Borah, J.; Bračko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cao, L.; Červenkov, D.; Chang, P.; Cheon, B. G.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cochran, J.; Das, S.; Dash, N.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Doležal, Z.; Dong, T. V.; Dubey, S.; Ecker, P.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Fulsom, B. G.; Garg, R.; Gaur, V.; Giri, A.; Goldenzweig, P.; Gu, T.; Gudkova, K.; Hadjivasiliou, C.; Hara, T.; Hayashii, H.; Hazra, S.; Hedges, M. T.; Herrmann, D.; Hernández Villanueva, M.; Hou, W. -S.; Hsu, C. -L.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kodyš, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumar, M.; Kumar, R.; Kwon, Y. -J.; Lam, T.; Lee, S. C.; Lewis, P.; Li, L. K.; Li Gioi, L.; Libby, J.; Liventsev, D.; Ma, Y.; Matsuda, T.; Matvienko, D.; Maurya, S. K.; Meier, F.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakamura, I.; Nakao, M.; Narwal, D.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nishida, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Park, S. -H.; Passeri, A.; Patra, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Röhrken, M.; Rout, N.; Russo, G.; Sandilya, S.; Santelj, L.; Savinov, V.; Schmolz, P.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Shan, W.; Shiu, J. -G.; Singh, J. B.; Solovieva, E.; Starič, M.; Stottler, Z. S.; Sumihama, M.; Takizawa, M.; Tanida, K.; Tenchini, F.; Tiwary, R.; Trabelsi, K.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, S. E.; Varvell, K. E.; Vossen, A.; Wang, M. -Z.; Wang, X. L.; Won, E.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Yin, J. H.; Yuan, L.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.

doi:10.1103/PhysRevLett.133.131801

Title: Measurement of Angular Coefficients of $\bar{B} \to D^{*} ℓ {\bar{ν}}_{ℓ}$ : Implications for $| V_{c b} |$ and Tests of Lepton Flavor Universality

Journal Article · 23 September 2024 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.133.131801 · OSTI ID:2447867

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We measure the complete set of angular coefficients $J_{i}$ for exclusive $\bar{B} \to D^{*} ℓ {\bar{ν}}_{ℓ}$ decays ( $ℓ = e$ , $μ$ ). Our analysis uses the full $711 {fb}^{- 1}$ Belle dataset with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the $\bar{B} \to D^{*}$ transition and the Cabibbo-Kobayashi-Maskawa matrix element $| V_{cb} |$ . Using recent lattice QCD calculations for the hadronic form factors, we find $| V_{cb} | = (40.7 \pm 0.7) \times 10^{- 3}$ using the Boyd-Grinstein-Lebed parametrization, compatible with determinations from inclusive semileptonic decays. We search for lepton flavor universality violation as a function of the hadronic recoil parameter $w$ and investigate the differences of the electron and muon angular distributions. We find no deviation from standard model expectations. Published by the American Physical Society 2024

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2447867

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 133; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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