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

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

1997-07-17

arxiv.org/abs/hep-ph/9707369v1

Int.J.Mod.Phys. A13 (1998) 3587-3600

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 19 pages

Scientific paper

10.1142/S0217751X98001682

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 $K^0-\bar{K^0}$ and $B^0-\bar{B^0}$ mixed systems. The formalism is applied to compute the time evolution amplitudes of $K^0$ and $\bar{K^0}$ studied in DAPHNE and CPLEAR experiments. We also introduce a new set of parameters that describe CP violation in $ K \to \pi\pi$ decays without recourse to isospin decomposition of the decay amplitudes.

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