Production of Heavy Quarks Close to Threshold

Abstract

We calculate production by vector and axial currents of heavy quark pairs ($c\bar{c}$, $b\bar{b}$, $t\bar{t}$) close to threshold. We take into account strong interaction contributions (including radiative corrections and leading nonperturbative effects) by using the Fermi-Watson final state interaction theorem. We use the results obtained to compare with experiment for open production of $c\bar{c}$, $b\bar{b}$ near threshold, and to give a reliable estimate of the so-called ``threshold effects'' contribution to vector and axial correlators, for $t\bar{t}$, $i.e.$, the contribution of regions close to $4m_t^2$ to $\Pi (t)$, for small values of $t$ ($ 0 < t \lower2pt\hbox{$\lesssim$} M_Z^2 $).

36 pages, uses RevTeX, 7 postscript figures available upon request

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Cited by in corpus (6)

• Gluon Condensate from Superconvergent QCD Sum Rule
• Perturbative O(alpha_s^2) Corrections to the Hadronic Cross Section Near Heavy Quark-Antiquark Thresholds in e+e- Annihilation
• Central exclusive production of longlived gluinos at the LHC
• Threshold resummation $S$-factor in QCD: the case of unequal masses
• The Vacuum Polarization Function to O(alpha^2) Accuracy Near Threshold and Darwin Corrections
• Nonperturbative Effects in Quarkonia Associated with Large Orders in Perturbation Theory