abstract We review the recent experimental and theoretical progress in the determination of |Vud| and |Vus|, and the status of the most stringent test of CKM unitarity. Future prospects on |Vcd| and |Vcs| are also briefly discussed.
authors Abele H. Blucher E. Cirigliano V. De Lucia E. Flores Mendieta Rubén Flynn J. Gatti C. Isidori G. Lubicz V. Manohar A.V. Marciano W. Pavlunin V. Pocanic D. Schwab F. Sirlin A. Tarantino C. Velasco M.