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Takashi Kaneko, Barbara Sciascia
The actual limit of the unitarity condition of the first row of the CKM matrix |V_ud|^2+|V_us|^2+|V_ub|^2=1+Δ_CKM is Δ_CKM=-0.0001(6). In 2010 the same was Δ_CKM=+0.0001(6). Despit…