New determination of |Vub/Vcb| from $$ {B}_s^0 $$ ? {K-, $$ {D}_s^{-} $$}µ+?
New determination of |Vub/Vcb| from $$ {B}_s^0 $$ ? {K-, $$ {D}_s^{-} $$}µ+?
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|Vub/Vcb|的新测定
DOI:
10.1007/jhep11(2023)082
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发表时间:
2023
影响因子:
5.4
通讯作者:
Bolognani C
中科院分区:
文献类型:
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作者:
Bolognani C
We update the full set ofs→ K form factors using light-cone sum rules with an on-shell kaon. Our approach determines the relevant sum rule parameters—the duality thresholds—from a Bayesian fit for the first time. Using a modified version of the Boyd-Grinstein-Lebed parametrisation, we combine our sum rule results at low momentum transfer q 2 with more precise lattice QCD results at large q 2. We obtain a consistent description of the form factors in the full q 2 range. Applying these results to a recent LHCb measurement of branching ratios for the decays→{K−,} μ+ ν μ, we determine the ratio of Cabibbo-Kobayashi-Maskawa elements