Speaker
Nikolai Zotov
(Moscow State University)
Description
We consider the transverse momentum dependent (TMD) quark densities of the
proton which are very important ingredients for unpolarized Drell-Yan
lepton pair production in proton-proton collisions at the LHC energies. We
calculate the TMD sea quark density as a convolution of the
Catani-Ciafaloni-Fiorani-Marchesini-evolved gluon distribution and the TMD
gluon-to-quark splitting function. This splitting function contains all
single logarithmic small-x corrections to the sea quark evolution for any
order of perturbation theory. Based on the O(α) production amplitude
q∗+q¯∗→Z/γ∗→l++l−, calculated by taking into account the effective
q∗q¯∗Z/γ∗ vertex, we analyze the distributions on the dilepton invariant
mass, transverse momentum and rapidity and specific angular correlations
between the produced leptons as measured by the CMS, ATLAS and LHCb
collaborations. We show that our predictions are sensitive to the TMD
quark distributions of the proton.
Primary author
Nikolai Zotov
(Moscow State University)
