Threshold expansion for heavy-light systems and flavor off-diagonal current-current correlators

Abstract

An expansion scheme is developed for Feynman diagrams describing the production of one massive and one massless particle near the threshold. As an example application, we compute the correlators of heavy-light quark currents, (\bar b gamma_mu u) and (\bar b gamma_5 u), through O(alpha_s^2).

4 pages, revtex4

References in corpus (4)

• Three-loop non-diagonal current correlators in QCD and NLO corrections to single-top-quark production
• Heavy-light current correlators at order ${\alpha }_s^2$ in QCD and HQET
• Semileptonic b --> u decays: lepton invariant mass spectrum
• Expansion of bound-state energies in powers of m/M

Cited by in corpus (11)

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• Analytic Reconstruction of heavy-quark two-point functions at O(α_s^3)
• 2-loop QCD corrections to Bc-meson leptonic constant
• Heavy quark form factors in the large ${\beta }_0$ limit
• QCD cusp anomalous dimension: current status
• Four-loop HQET propagators from the DRA method
• Multiloop calculations in HQET
• Correlators of heavy-light quark currents in HQET: OPE at three loops
• Three-loop results in HQET