Recently, the LHCb collaboration announced a preliminary result of the test
of lepton flavor universality (LFU) in BβD(β) semi-leptonic decays:
RDLHCb2022β=0.441Β±0.089 and RDβLHCb2022β=0.281Β±0.030 based on the LHC Run 1 data. This is the first result of
RDβ for the LHCb experiment, and its precision is comparable to the other
B-factory data. Interestingly, those data prefer the violation of the LFU
again. A new world average of the data from the BaBar, Belle, and LHCb
collaborations is RDβ=0.358Β±0.027 and RDββ=0.285Β±0.013. Including this new data, we update a circumstance of the bβcΟΞ½ measurements and their implications for new physics.
Incorporating recent developments for the BβD(β) form factors in
the Standard Model (SM), we observe a 4.1Ο deviation from the SM
predictions. Our updates also include; model-independent new physics (NP)
formulae for the related observables; and the global fittings of parameters for
leptoquark scenarios as well as single NP operator scenarios. Furthermore, we
show future potential to indirectly distinguish different new physics scenarios
with the use of the precise measurements of the polarization observables in
BβD(β)ΟΞ½ at the Belle II and the high-pTβ
flavored-tail searches at the LHC. We also discuss an impact on the LFU
violation in Ξ₯βl+lβ.Comment: 38 pages, 5 figures, 6 Tables; v2: references adde