Prompt J/Psi production at LHC: new evidence for the kt-factorization
Abstract
In the framework of the kt-factorization approach, the production and polarization of prompt J/Psi mesons in pp collisions at the LHC energy 7 TeV is studied. Both the direct production mechanism as well as feed-down contributions from chic1, chic2 and psi' decays are taken into account. Our consideration is based on the color singlet model supplemented with the off-shell matrix elements for the corresponding partonic subprocesses. The unintegrated gluon densities in a proton are determined using the CCFM evolution equation as well the Kimber-Martin-Ryskin prescription. We compare our numerical predictions with the first experimental data taken by the CMS, ATLAS and LHCb collaborations. The estimation of all polarization parameters which determine J/Psi spin density matrix is performed.
Keywords
Cite
@article{arxiv.1108.2856,
title = {Prompt J/Psi production at LHC: new evidence for the kt-factorization},
author = {S. P. Baranov and A. V. Lipatov and N. P. Zotov},
journal= {arXiv preprint arXiv:1108.2856},
year = {2015}
}
Comments
14 pages, 3 figures