QCD AND INTRINSIC HEAVY QUARK PREDICTIONS FOR LEADING CHARM AND BEAUTY HADROPRODUCTION

摘要

Recent experiments at Fermilab and CERN have observed a strong asymmetry between the hadroproduction cross sections of leading D mesons, containing projectile valence quarks, and nonleading charmed mesons, without projectile valence quarks. The observed correlations of the pi(+/-)N --> D(+/-)X cross section with the projectile charge violates the usual assumption that heavy quark jet fragmentation factorizes. We examine the asymmetry between leading and nonleading charm production as a function of x(F) and p(T)(2) assuming a two-component model combining leading-twist fusion subprocesses and charm production from intrinsic heavy quark Fock stares. We predict a sizable asymmetry at low p(T)(2) and high x(F) from coalescence or me charm quarks with the comoving spectator quarks of the projectile. An intrinsic c (