Transverse momentum dependent parton densities in a proton from the generalized DAS approach
Abstract
We use the Bessel-inspired behavior of parton densities at small Bjorken values, obtained in the case of the flat initial conditions for DGLAP evolution equations in the double scaling QCD approximation (DAS), to evaluate the transverse momentum dependent (TMD, or unintegrated) quark and gluon distribution functions in a proton. The calculations are performed analytically using the Kimber-Martin-Ryskin (KMR) prescription with different implementation of kinematical constraint, reflecting the angular and strong ordering conditions. The relations between the differential and integral formulation of the KMR approach is discussed. Several phenomenological applications of the proposed TMD parton densities to the LHC processes are given.
Keywords
Cite
@article{arxiv.1911.01445,
title = {Transverse momentum dependent parton densities in a proton from the generalized DAS approach},
author = {A. V. Kotikov and A. V. Lipatov and B. G. Shaikhatdenov and P. Zhang},
journal= {arXiv preprint arXiv:1911.01445},
year = {2020}
}
Comments
24 pages, 9 figures