Processes with K-mesons that are due to weak flavor changing neutral currents (FCNC) are considered, primarily, the theoretically clean `golden decays’ K^+ \to \pi^+ \nu \-{\nu} and K_L^0 \to \pi^0 \nu \-{\nu}. Experimental data for these and other processes violating CP invariance are discussed, and the prospects of future studies are examined. The results of experiments with kaons are compared with those obtained for B-mesons (CP-odd asymmetry in the decays B_d^0(\-{B}_d^0) \to (J/\psi)K_S^0, B_d^0 \rightleftharpoons \-{B}_d^0 mixing). A possible interpretation of the data on the decays K \to \pi \nu \-{\nu}, K_L^0 \to \pi^0 e^+ e^-, and K_L^0 \to \mu^+ \mu^- is discussed within the framework of the Standard Model and of New Physics models.

TY JOUR
TI Flavor changing neutral currents and rare decays of K-mesons
AU Landsberg, L. G.
PB Physics-Uspekhi
PY 2003
JO Physics-Uspekhi
JF Physics-Uspekhi
JA Phys. Usp.
VL 46
IS 10
SP 995-1051
UR https://ufn.ru/en/articles/2003/10/a/
ER https://doi.org/10.1070/PU2003v046n10ABEH001331