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Field theory approach to K0 - anti-K0 and B0 - anti-B0 systems

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Beuthe, Michel [UCL] Lopez Castro, G. Pestieau, Jean

(eng) 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. Comment: Latex, 19 pages

Document type Article de périodique (Journal article)
Publication date 1998
Journal information "International Journal of Modern Physics A : particles and fields; gravitation; cosmology; nuclear physics" - Vol. A13, p. 3587-3600 (1998)
Peer reviewed yes
e-issn 1793-656X
issn 0217-751X
Publication status Publié
Affiliation UCL - SC/PHYS - Département de physique
Keywords High Energy Physics - Phenomenology
Links
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Bibliographic reference Beuthe, Michel ; Lopez Castro, G. ; Pestieau, Jean. Field theory approach to K0 - anti-K0 and B0 - anti-B0 systems. In: International Journal of Modern Physics A : particles and fields; gravitation; cosmology; nuclear physics, Vol. A13, p. 3587-3600 (1998)
Permanent URL http://hdl.handle.net/2078/31625