Summing Sudakov logarithms inB→Xsγin effective field theory
نویسندگان
چکیده
منابع مشابه
Summing up Subleading Sudakov Logarithms
We apply the strategy of regions within dimensional regularization to find functions involved in evolution equations which govern the asymptotic dynamics of the Abelian form factor and four-fermion amplitude in the SU(N) gauge theory in the Sudakov limit up to the next-to-leading logarithmic approximation. The results are used for the analysis of the dominant electroweak corrections to the ferm...
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We construct an effective field theory valid for processes in which highly energetic light-like particles interact with collinear and soft degrees of freedom, using the decay B → Xsγ near the endpoint of the photon spectrum, x = 2Eγ/mb → 1, as an example. Below the scale μ = mb both soft and collinear degrees of freedom are included in the effective theory, while below the scale μ = mb √ x− y, ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.63.014006