Weak matrix elements with gauge invariant Kogut-Susskind operators

Pion decay constant and K meson B parameter are evaluated using non-local operators with and without gauge link variables addressing the question how the choice of operators affect the value of matrix elements. Calculation is made for both full and quenched QCD with Kogut-Susskind fermions. It is sh...

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Bibliographic Details
Published inNuclear physics. Section B, Proceedings supplement Vol. 30; pp. 415 - 418
Main Authors Ishizuka, N., Fukugita, M., Mino, H., Okawa, M., Shizawa, Y., Ukawa, A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.1993
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Summary:Pion decay constant and K meson B parameter are evaluated using non-local operators with and without gauge link variables addressing the question how the choice of operators affect the value of matrix elements. Calculation is made for both full and quenched QCD with Kogut-Susskind fermions. It is shown that the results obtained with the gauge non-invariant operators agree with those of the gauge invariant operators, if corrected by the Z factor using the mean-field improvement of the gauge coupling constant and operators.
ISSN:0920-5632
1873-3832
DOI:10.1016/0920-5632(93)90240-7