The Effective Weak Hamiltonian beyond the Leading-logarithm Approximation*
نویسنده
چکیده
The effective nonleptonic weak Hamiltonian is examined beyond the leading-logarithm approximation. In the AS=l, AC=1 part of the Hamiltonian no significant contribution is found. In the AS=l, AC=0 sector coefficients of the "penguin" operators depend strongly on added corrections. The momentum subtraction scheme has been used in the calculation. The independence of the result on the renormalization procedure, as well as on the choice of the renormalization point u is discussed. Submitted to Nuclear Physics B * Work supported by the Department of Energy, contract DE-AC03-76SF00515. t On leave of absence from the Rudjer BogkoviE Institute, Zagreb, Croatia, Yugoslavia.
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