PT Journal
AU Donini, A
   Hernandez, P
   Pena, C
   Romero-Lopez, F
TI Nonleptonic kaon decays at large N-c
SO Physical Review D
JI Phys. Rev. D
PY 2016
BP 114511
EP 6pp
VL 94
IS 11
DI 10.1103/PhysRevD.94.114511
LA English
AB We study the scaling with the number of colors, N-c, of the weak amplitudes mediating kaon mixing and decay. We evaluate the amplitudes of the two relevant current-current operators on the lattice for N-c = 3-7. We conclude that the subleading 1/N-c corrections in B-k, are small, but those in the K -> pi pi amplitudes are large and fully anticoirelated in the I = 0, 2 isospin channels. We briefly comment on the implications for the Delta I = 1/2 rule.
ER