Reconstruction of heavy quark current correlators at O(alpha(s)**3)

Jul, 2009
24 pages
Published in:
  • Nucl.Phys.B 823 (2009) 269-287
e-Print:
Report number:
  • TPP09-17,
  • SFB-CPP-09-50

Citations per year

20092013201720212024051015
Abstract: (Elsevier)
We construct approximate formulas for the O ( α s 3 ) QCD contributions to vector, axial-vector, scalar and pseudo-scalar quark current correlators, which are valid for arbitrary values of momenta and masses. The derivation is based on conformal mapping and the Padé approximation procedure and incorporates known expansions in the low energy, threshold and high energy regions. We use our results to estimate additional terms in these expansions.
  • 14.65.Dw
  • 12.38.-t
  • 12.38.Bx
  • 14.65.Ha
  • 14.65.Fy
  • Perturbative calculations
  • Quantum chromodynamics
  • Heavy quarks
  • current: correlation function
  • quark: current