Speaker
Prof.
Gennady Lykasov
(Joint Institute for Nuclear Research , Dubna 141980, Moscow region, Russia)
Description
We study the unintegrated TMD (transverse momentum dependent) gluon density obtained from the best description of the LHC data on the inclusive spectra of charged hadrons produced in the mid-rapidity region and low transverse momenta at starting scale Q_0^2 = 1 (GeV/c)^2. To extend this unintegrated gluon density (u.g.d) at higher Q^2 we use the Catani-Ciafoloni-Fiorani-Marchesini (CCFM) evolution equation. The influence of the initial (starting) non-perturbative gluon density is studied. It is shown that the evoluted u.g.d. is very sensitive to the starting u.g.d. especially at low intrinsic transverse momenta |k_T|< 1. GeV/c. The inclusion of the CCFM evolution results in a large increase of the u.g.d. magnitude at small x and large |k_T| above a few GeV/c. The application of the obtained gluon distribution to the analysis of the e-p deep inelastic scattering allows us to get the results, which describe reasonably well the H1 and ZEUS data on the longitudinal proton structure function F_L(x,Q^2). So, the connection between the soft processes at LHC and small x physics at HERA has been confirmed and extended to a wide kinematical region. This work is the continuation of our previous study of the unintegrated gluon densities at small x.
Author
Dr
Artem Lipatov
(Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia)
Co-authors
Prof.
Gennady Lykasov
(Joint Institute for Nuclear Research , Dubna 141980, Moscow region, Russia)
Prof.
Nikolay Zotov
(Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia)
