Hardronic Interactions of Strange Mesons

Abstract

Nonleptonic kaon decays K → ππ and the matrix element of the K0−K¯ 0 transition were studied within the framework of the Quark Conned Model using eective four-quark Hamiltonians. The role of intermediate hadronic states in the description of these processes was studied. It is shown that correct consideration of the intermediate scalar state f0(600) allows one to obtain the relation γ+− = ( Γ(KS→π +π−) Γ(K0→π+π0) = 433.84, which is close to the experimental value, which makes it possible to explain the ∆I = 1 2 rule. Account of intermediate scalar, pseudo scalar and axial vector states made it possible to obtain the mass dierence K0 L and K0 S ∆mLS = 3.25×10 −15GeV , which is in good agreement with the experimental value.