Heavy Quark Production in the Semihard Qcd Approach at Hera and Beyond
نویسندگان
چکیده
The experimental results on bb̄−pair production cross sections obtained by the H1 and ZEUS Collaborations at HERA and D0 and CDF Collaborations at TEVATRON provide a strong impetus for further theoretical studies. Comparisons of these results with NLO pQCD calculations show that they underestimate the cross sections at HERA and TEVATRON energies. Therefore, it looks certainly reasonable to try a different approach. In this work we focus on the description of bb̄−pair cross sections at HERA and TEVATRON in the so called semihard (kT factorization) QCD approach (SHA), which we have applied earlier to open charm and J/Ψ photoproduction at HERA (see in ref.). We also discuss the sensitivity of our theoretical results to the BFKL type dynamics which may be investigated in the photoproduction of D∗ and J/Ψ mesons at THERA energies. In SHA, the unintegrated gluon distribution φG(x, k T ) is connected with the conventional gluon density xG(x, Q) by the following relation
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