Theoretical point of view on Cabibbo angle anomaly

In this paper, we present the current situation of the determinations of the first-row CKM components and show the Cabibbo angle anomaly corresponding to a deficit in the first-row CKM unitarity condition at the 3σ level. In this contribution, we show two new physics interpretations: heavy vector-like quark models and a MeV scale sterile neutrino scenario. The super tau-charm facility will directly probe the other CKM unitarity conditions related to Vcd.

Note:

Invited contribution to FTCF2024; 15 pages, 5 figures, 1 table

CKM matrix
electroweak interactions
sterile neutrino
12.15.Ff
14.60.Pq
12.15.Ji
14.60.St

References(0)

Figures(7)

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