Three-loop $b\to s\gamma$ vertex with current-current operators

Autor: Fael, Matteo, Lange, Fabian, Schoenwald, Kay, Steinhauser, Matthias
Rok vydání: 2023
Předmět:
Zdroj: JHEP 11 (2023) 166
Druh dokumentu: Working Paper
Popis: We compute three-loop vertex corrections to $b\to s\gamma$ induced by current-current operators. The results are presented as expansions in $m_c/m_b$ with numerical coefficients which allow to cover all relevant values for the heavy quark masses in different renormalization schemes. Moreover we provide for the first time analytic results for the next-to-leading order contribution. Our results present an important building block to the next-to-next-to-leading order interference contributions of the current-current operators $Q_1$ and $Q_2$ with the electric dipole operator $Q_7$.
Comment: 22 pages;v2: minor modifications,agrees with published version
Databáze: arXiv
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