Resummed heavy quark production cross sections to next-to-leading   logarithm
  We study how next-to-leading logarithms modify predictions from leading logarithmic soft-gluon resummation in the heavy quark production cross section near threshold. Numerical results are presented for top quark production at the Fermilab Tevatron and bottom quark production at fixed-target energies. 
N. Kidonakis, J. Smith and R. Vogt