Experimental Tests of the Okubo-Zweig-Iizuka Rule in Hadron Interactions

摘要

The Okubo-Zweig-Iizuka rule (OZI) [1] was suggested at the early stage of the development of the quark model of hadrons. G. Zweig wanted to explain why the Φ(1020) meson, whose mass is barely above the mass of the K(K-bar) system, decays preferentially into two kaons but not into the πρ channel in spite of larger phase space. He proposed that it has an internal structure which is more similar to the kaon than to the pion and assumed that the strange quarks of Φ prefer to maintain their identity rather than transform to light quarks.