Momentum dependence of the penguin interaction View Full Text


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Article Info

DATE

1997-12

AUTHORS

A. E. Bergan, J. O. Eeg

ABSTRACT

We have considered the penguin interaction contribution to K → 2π decays. In particular, we have investigated the effect of the momentum dependence of the penguin coefficient. Our analysis is performed within the Chiral Quark Model where quarks are coupled to the pseudoscalar mesons, which means that hadronic matrix elements can be calculated in terms of quark loop diagrams. We have inserted the momentum dependent penguin coefficient into the relevant quark loop diagrams for K → π. We discuss two possible prescriptions for performing the calculations, and conclude that the momentum dependence of the penguin coefficient increases the amplitude by 10–20%. In any case, the (CP-conserving) penguin contribution is very sensitive to the values chosen for the involved parameters. More... »

PAGES

669-676

References to SciGraph publications

  • 1994-09. mixing in a low energy effective QCD in ZEITSCHRIFT FÜR PHYSIK C PARTICLES AND FIELDS
  • 1975-06. Functional integral in perturbation theory in THEORETICAL AND MATHEMATICAL PHYSICS
  • Identifiers

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    http://scigraph.springernature.com/pub.10.1007/s002880050358

    DOI

    http://dx.doi.org/10.1007/s002880050358

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