Improved determination of the electroweak penguin contribution to ϵ′/ϵ in the chiral limit
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چکیده
منابع مشابه
Improved Determination of the Electroweak Penguin Contribution to ǫ/ǫ in the Chiral Limit
We perform a finite energy sum rule analysis of the flavor ud two-point VA current correlator, ∆Π(Q2). The analysis, which is performed using both the ALEPH and OPAL databases for the V-A spectral function, ∆ρ, allows us to extract the dimension six V-A OPE coefficient, a6, which is related to the matrix element of the electroweak penguin operator, Q8, by chiral symmetry. The result for a6 lead...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2003
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(03)00010-8