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  • Letter
  • Open Access

Shedding new light on R(D(s)(*)) and |Vcb| from semileptonic B¯(s)→D(s)(*)ℓν¯ℓ decays

Bo-Yan Cui*, Yong-Kang Huang†, Yu-Ming Wang‡, and Xue-Chen Zhao§

  • School of Physics, Nankai University, Weijin Road 94, Tianjin 300071, People’s Republic of China

  • *boyancui@nankai.edu.cn
  • †huangyongkang@mail.nankai.edu.cn
  • ‡Corresponding author: wangyuming@nankai.edu.cn
  • §Corresponding author: zxc@mail.nankai.edu.cn
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Phys. Rev. D 108, L071504 – Published 20 October, 2023

DOI: https://doi.org/10.1103/PhysRevD.108.L071504

Abstract

We compute for the first time the next-to-leading-order QCD corrections to the B¯(s)→D(s)(*) form factors at large hadronic recoil. Both the charm-quark-mass- and the strange-quark-mass- dependent pieces can generate the leading-power contributions to these form factors. Including further various power-suppressed contributions, we perform the combined fits of the considered form factors to both our large-recoil theory predictions and the lattice QCD results, thus improving upon the previous determinations of the lepton-flavor-universality ratios R(D(*)) significantly.

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Phys. Rev. D 108, L071504– Published 20 October, 2023
  • Received 22 February 2023
  • Revised 26 August 2023
  • Accepted 25 September 2023
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