TTP - TTP05-19 Summing next-to-next-to-leading logarithms in b->c transitions at zero recoil

Institute for Theoretical Particle Physics (TTP)

TTP05-19 Summing next-to-next-to-leading logarithms in b-

c transitions at zero recoil > The HQET-1 → HQET-2 matching coefficient for the b→c currents at zero recoil has been found with two-loop accuracy. The next-to-next-to-leading logarithms has been summed in the leading order in m_c/m_b. Higher-order corrections are estimated in the large-\beta_0 limit.

Andrey Grozin

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TTP05-19 Summing next-to-next-to-leading logarithms in b->c transitions at zero recoil

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