Field theory approach to K0-K0bar and B0-B0bar systems

الأصل · EN

Quantum field theory provides a consistent framework to deal with unstable particles. We present here an approach based on field theory to describe the production and decay of unstable K⁰-K⁰ and B⁰-B⁰ mixed systems. The formalism is applied to compute the time evolution amplitudes of K⁰ and K⁰ studied in DAPHNE and CPLEAR experiments. We also introduce a new set of parameters that describe CP violation in K → ππ decays without recourse to isospin decomposition of the decay amplitudes.