Hadroproduction of heavy quarkonia at the LHC

The production of heavy quarkonia at the LHC is considered. It is shown that, in the case of the inclusive production of chi (cJ) P-wave charmonia, existing experimental data can be described upon taking into account next-to-leading corrections, a dominant contribution coming from color-singlet states. For the case of B (c) -meson production, it is shown that, at experimentally accessible values of the transverse momentum, power-law corrections to the cross section make a significant contribution, with the result that the cross-section ratio sigma(B (c) )/sigma(B) develops a p (T) dependence not observed in the fragmentation regime. The case of double vector-charmonium production is also considered.