Production of heavy quarks and heavy quarkonia

Abstract

Uncertainties in the next-to-leading-order calculations of heavy-quark ($Q$) production are investigated. Predictions for total cross sections, single-inclusive distributions of heavy quarks and heavy flavoured hadrons, as well as for $Q\bar{Q}$ correlations, are compared with charm and bottom data. The description of heavy-quarkonium production requires a separation of the short-distance scale of $Q\bar{Q}$ production, which is set by the heavy-quark mass from the longer-distance scales associated with the bound-state formation. Various factorization approaches are compared, in particular with respect to the different constraints imposed on the colour and angular-momentum states of the $Q\bar{Q}$ pair(s) within a specific quarkonium state. Theoretical predictions are confronted with data on heavy-quarkonium production at fixed-target experiments and also at $p\bar{p}$ colliders, where fragmentation gives the leading-twist cross section in $1/p_T^2$ and $1/m^2$ at high transverse momentum.

26 pages, Latex, 11 Z-compressed and uuencoded figures

References in corpus (1)

• Quarkonium production and decays

Cited by in corpus (10)

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• Constraining gluon density of pions at large $x$ by pion-induced $J/\psi$ production
• Quarkonium Production through Hard Comover Scattering
• Power Law in Hadron Production
• Hadroproduction of the Chi1 and Chi2 States of Charmonium in 800 GeV/c Proton-Silicon Interactions
• Rescattering Effects in Quarkonium Production
• NRQCD analysis of charmonium production with pion and proton beams at fixed-target energies
• Color-Octet Charmonium Production in Top Quark Decays
• Highlights of Cern Workshop on Charm Production in A+A Collisions