High Energy Physics - Phenomenology
[Submitted on 8 Jan 2004
]
Title: Three-loop matching of the dipole operators for b -> s gamma and b -> s g
Title: 三环匹配双极子算符 b → s gamma 和 b → s g
Abstract: We evaluate the three-loop matching conditions for the dimension-five operators that are relevant for the b -> s gamma decay. Our calculation completes the first out of three steps (matching, mixing and matrix elements) that are necessary for finding the next-to-next-to-leading QCD corrections to this process. All such corrections must be calculated in view of the ongoing accurate measurements of the B -> Xs gamma branching ratio.
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