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Consistent probabilistic description of the neutral Kaon system

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Consistent probabilistic description of the neutral Kaon system

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dc.contributor.author Bernabeu Alberola, José
dc.contributor.author Mavromatos, N. E.
dc.contributor.author Villanueva Pérez, Pablo
dc.date.accessioned 2014-02-20T10:32:47Z
dc.date.available 2014-02-20T10:32:47Z
dc.date.issued 2013
dc.identifier.citation Bernabeu Alberola, José; Mavromatos, N.E.; Villanueva Pérez, Pablo (2013) Consistent probabilistic description of the neutral Kaon system Physics Letters B 724 4-5 269 273
dc.identifier.uri http://hdl.handle.net/10550/33124
dc.description.abstract The neutral Kaon system has both CF violation in the mass matrix and a non-vanishing lifetime difference in the width matrix. This leads to an effective Hamiltonian which is not a normal operator, with incompatible (non-commuting) masses and widths. In the Weisskopf-Wigner Approach (WWA), by diagonalizing the entire Hamiltonian, the unphysical non-orthogonal ¿stationary¿ states K-L,K-S are obtained. These states have complex eigenvalues whose real (imaginary) part does not coincide with the eigenvalues of the mass (width). matrix. In this work we describe the system as an open Lindblad-type quantum mechanical system due to Kaon decays. This approach, in terms of density matrices for initial and final states, provides a consistent probabilistic description, avoiding the standard problems because the width matrix becomes a composite operator not included in the Hamiltonian. We consider the dominant decay channel to two pions, so that one of the Kaon states with definite lifetime becomes stable. This new approach provides results for the time dependent decay rates in agreement with those of the WWA.
dc.relation.ispartof Physics Letters B, 2013, vol. 724, num. 4-5, p. 269-273
dc.subject Física nuclear
dc.title Consistent probabilistic description of the neutral Kaon system
dc.type journal article es_ES
dc.date.updated 2014-02-20T10:32:47Z
dc.identifier.doi 10.1016/j.physletb.2013.06.025
dc.identifier.idgrec 090967
dc.rights.accessRights open access es_ES
dc.identifier.url 10.1016/j.physletb.2013.06.025

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