Speaker
Prof.
Gennady Lykasov
(JINR)
Description
We study the role of the non-perturbative input to the transverse momentum dependent (TMD)
gluon density in hard processes at the LHC.
We derive the input TMD gluon distribution at a low scale $\mu_0^2 \sim 1$~GeV$^2$
from a fit of inclusive hadron spectra measured at low
transverse momenta in $pp$ collisions at the LHC
and demonstrate that the best description of these spectra
for larger hadron transverse momenta
can be achieved by matching the derived TMD gluon distribution
with the exact solution of the Balitsky-Fadin-Kuraev-Lipatov (BFKL)
equation obtained at low $x$ and small gluon transverse momenta
outside the saturation region, see for example [1].
Then, we
extend the input TMD gluon density to higher $\mu^2$ numerically using
the Catani-Ciafoloni-Fiorani-Marchesini (CCFM) gluon evolution equation.
Special attention
is paid to phenomenological applications of the obtained
TMD gluon density to some LHC processes, which are sensitive to the gluon
content of a proton [2].
References.
[1] Yu.V.Kovchegov, Phys. Rev. D61, 074018 (2000).
[2] A.A.Grinyuk, A.V.Lipatov, G.I.Lykasov, N.P.Zotov, Phys. Rev. D93, 014035 (2016).
Summary
The new unintegrated gluon density (MD2015) is proposed. Its application to the analysis of the DIS and inelastic p-p processes at the LHC energies allows us to describe rather satisfactorily the charm and beauty contribution to the proton structure function F2 and the longitudinal structure function FL, and many observables on the soft and hard p-p reactions.
Primary authors
Dr
Artem Lipatov
(Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia)
Prof.
Gennady Lykasov
(JINR)
Co-authors
Mr
Andrei Grinyuk
(JINR)
Dr
Nikolai Zotov
(Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia)
