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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Validity of chiral perturbation theory for K0-K0 mixing

Author

  • Johan Bijnens
  • Hidenori Sonoda
  • Mark B. Wise

Summary, in English

Chiral perturbation theory relates the |S|=2 matrix element K0|(sd)V-A×(sd)V-A|K0 to the |S|=1 matrix element +0|(sd)V-A(uu)V-A+(su)V- A×(ud)V-A-(sd)V-A(dd)V-A|K+. The latter matrix element is measured in K++0 decay and the former matrix element is relevant for the predictions that the standard model makes for CP nonconservation in K0-K0 mixing. In this paper the corrections of order mK4 lnmK2 to lowest-order chiral perturbation theory (i.e., order mK2) for these matrix elements are computed. The correction is large for the |S|=2 matrix element indicating a breakdown of chiral perturbation theory.

Publishing year

1984-01-01

Language

English

Pages

2367-2370

Publication/Series

Physical Review Letters

Volume

53

Issue

25

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-9007