Phys. Rev. Lett. 53, 2367–2370 (1984)Validity of Chiral Perturbation Theory for K0-K―0 MixingReceived 18 October 1984; published in the issue dated 17 December 1984 Chiral perturbation theory relates the |ΔS|=2 matrix element 〈K―0|(s―d)V-A×(s―d)V-A|K0〉 to the |ΔS|=1 matrix element 〈π+π0|(s―d)V-A(u―u)V-A+(s―u)V-A×(u―d)V-A-(s―d)V-A(d―d)V-A|K+〉. The latter matrix element is measured in K+→π+π0 decay and the former matrix element is relevant for the predictions that the standard model makes for CP nonconservation in K0-K―0 mixing. In this paper the corrections of order mK4lnmK2 to lowest-order chiral perturbation theory (i.e., order mK2) for these matrix elements are computed. The correction is large for the |ΔS|=2 matrix element indicating a breakdown of chiral perturbation theory. © 1984 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.53.2367
DOI:
10.1103/PhysRevLett.53.2367
PACS:
11.30.Rd, 11.30.Er, 13.25.+m, 14.40.Ag
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.