Decayb→(cc¯)sin the leading logarithm approximation
نویسندگان
چکیده
منابع مشابه
The Effective Weak Hamiltonian beyond the Leading-logarithm Approximation*
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 renormaliza...
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An approach which unifies the Double Logarithmic Approximation at small x and the leading order DGLAP evolution of fragmentation functions at large x is presented. This approach reproduces exactly the Modified Leading Logarithm Approximation, but is more complete due to the degrees of freedom given to the quark sector and the inclusion of the fixed order terms. We find that data from the larges...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2008
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.77.074007