Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-10-31
Phys.Lett.B498:23-28,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages 5 figures Changes: 1- Added refs 24,25; 2- Added two sentences, top of column 2 of page 3, on the definition of x, its
Scientific paper
10.1016/S0370-2693(00)01373-3
Charm and bottom production near threshold is sensitive to the multi-quark, gluonic, and hidden-color correlations of hadronic and nuclear wavefunctions in QCD since all of the target's constituents must act coherently within the small interaction volume of the heavy quark production subprocess. Although such multi-parton subprocess cross sections are suppressed by powers of $1/m^2_Q$, they have less phase-space suppression and can dominate the contributions of the leading-twist single-gluon subprocesses in the threshold regime. The small rates for open and hidden charm photoproduction at threshold call for a dedicated facility.
Brodsky Stanley J.
Chudakov Eugene
Hoyer Paul
Laget J.-M.
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