HADRONIC PRODUCTION OF BARYONS CONTAINING 2 HEAVY QUARKS

The total and differential cross sections for the production of Xi(bc) ', Xi(bc)(()), and Xi(cc)((*)) baryons in gluonic collisions are calc ulated. The production of the doubly heavy (bc) and (cc) diquarks is c onsidered in the leading order in alpha(s). It is shown that, for both low and high transverse momenta of the baryons, the use of the mechan ism of the heavy-quark fragmentation into a heavy diquark leads to the cross-section values that are small than the exact numerical results obtained by evaluating the complete set of diagrams. The yields of bar yons and antibaryons involving two heavy quarks are estimated for the Tevatron experiments. The results are (1.3 +/- 0.3) x 10(5) bcq baryon s and (1.6 +/- 0.3) x 10(4) ccq baryons at p(T) > 5 GeV and /y/ < 1 wi th allowance for antiparticle production.