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arXiv · 2104.13462

Transverse momentum dependent parton densities in processes with heavy quark generations

A. V. Kotikov·A. V. Lipatov·P. Zhang
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Abstract

To study the heavy quark production processes, we use the transverse momentum dependent (TMD, or unintegrated) gluon distribution function in a proton obtained recently using the Kimber-Martin-Ryskin prescription from the Bessel-inspired behavior of parton densities at small Bjorken $x$ values. We obtained a good agreement of our results with the latest HERA experimental data for reduced cross sections $\sigma^{c\overline{c}}_{\rm red}(x,Q^2)$ and $\sigma^{b\overline{b}}_{\rm red}(x,Q^2)$, and also for deep inelastic structure functions $F_2^c(x,Q^2)$ and $F_2^b(x,Q^2)$ in a wide range of $x$ and $Q^2$ values. Comparisons with the predictions based on the Ciafaloni-Catani-Fiorani-Marchesini evolution equation and with the results of conventional pQCD calculations performed at first three orders of perturbative expansion are presented.

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A. V. Kotikov, A. V. Lipatov, P. Zhang. 2021-04-27. Transverse momentum dependent parton densities in processes with heavy quark generations. https://doi.org/10.1103/physrevd.104.054042

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