The V puzzle: An update
The V puzzle: An update
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DOI:
10.1016/j.physletb.2019.06.039
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发表时间:
2019-05
影响因子:
4.4
通讯作者:
P. Gambino;M. Jung;S. Schacht
中科院分区:
文献类型:
--
作者:
P. Gambino;M. Jung;S. Schacht
We discuss the impact of the recent untagged analysis of B 0→ D⁎ l ν¯ l decays by the Belle Collaboration on the extraction of the CKM element| V c b| and provide updated SM predictions for the b→ c τ ν observables R (D⁎), P τ, and F L D⁎. The value of| V c b| that we find is about 2σ from the one from inclusive semileptonic B decays, and is very sensitive to the slope of the form factor at zero recoil which should soon become available from lattice calculations.