Transverse momentum dependent parton densities in processes with heavy quark generations

We study the heavy quark production processes with the transverse momentum dependent (unintegrated) gluon distribution function in a proton which is obtained recently using the Kimber-Martin-Ryskin prescription from the Bessel-inspired behavior of parton densities at small Bjorken x values. Our resu...

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Bibliographic Details
Published in:Physical review. D 2021-09, Vol.104 (5), p.1, Article 054042
Main Authors: Kotikov, A. V., Lipatov, A. V., Zhang, P. M.
Format: Article
Language:English
Subjects:
Distribution functions
Gluons
Partons
Quarks
Transverse momentum
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Summary:We study the heavy quark production processes with the transverse momentum dependent (unintegrated) gluon distribution function in a proton which is obtained recently using the Kimber-Martin-Ryskin prescription from the Bessel-inspired behavior of parton densities at small Bjorken x values. Our results agree with the latest HERA experimental data for reduced cross sections σredcc (x, Q2) and σredbb (x, Q2), and also for deep inelastic structure functions F2c (x, Q2) and F2b (x, Q2) in a wide range of x and Q2 values. Comparisons with the predictions based on the Ciafaloni-Catani-Fiorani-Marchesini evolution equation and with the results of conventional pQCD calculations performed at the first three orders of perturbative expansion are presented.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.104.054042