Abstract
The anomalous dimension of the heavy-light quark current in HQET is calculated up to four loops. The N3LL perturbative correction to fB/fD is obtained.
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Acknowledgments
I am grateful to R. N. Lee for numerous discussions and consultations on LiteRed2. The work has been supported by the Russian Science Foundation, grant number 20-12-00205.
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Grozin, A. Anomalous dimension of the heavy-light quark current in HQET up to four loops. J. High Energ. Phys. 2024, 198 (2024). https://doi.org/10.1007/JHEP02(2024)198
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DOI: https://doi.org/10.1007/JHEP02(2024)198