Long-distance dimension-eight operators inBK
نویسندگان
چکیده
منابع مشابه
Long-distance dimension-eight operators in BK
Besides their appearance at short distances >∼ 1/MW , local dimension-eight operators also contribute to kaon matrix elements at long distances of order ∼ 1/μope, where μope is the scale controlling the Operator Product Expansion in pure QCD, without weak interactions. This comes about in the matching condition between the effective quark Lagrangian and the Chiral Lagrangian of mesons. Working ...
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We discuss recent work which identifies a potential flaw in standard treatments of weak decay amplitudes , including that of ǫ ′ /ǫ. The point is that (contrary to conventional wisdom) dimension-eight operators contribute to weak amplitudes at order G F αs and without 1/M 2 W suppression. The effect of dimension-eight operators is estimated to be at the 100% level in a sum rule determination of...
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I describe recent work with V. Cirigliano and E. Golowich on the effect of dimension eight operators on weak nonleptonic amplitudes. The basic message is that there is an inconsistency in the way that many calculations are traditionally performed. If one calculates matrix elements involving only physics below some scale μ, then one needs dimension eight operators explicitly in the weak OPE. On ...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2003
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2003/03/060