New four-quark "S=2 local operator

John F. Donoghue, Eugene Golowich, German Valencia

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We describe a new four-quark "S=2 local operator, which we dub the dipenguin operator. Its form is derived and its K» 0-to-K0 matrix element is estimated. Also, we comment upon bag-model evaluations of K» 0-to-K0 matrix elements of (V-A)×(V-A) operators.

Original languageEnglish
Pages (from-to)1387-1390
Number of pages4
JournalPhysical Review D
Issue number5
Publication statusPublished - 1986
Externally publishedYes

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