TMDs at NLO obtained with the Parton Branching method using HERA DIS measurements are presented. Two choices for the scale at which the strong coupling is evaluated are investigated. The TMDs are applied to two LHC processes: the Drell-Yan pT spectrum and the azimuthal correlation in high pT dijet events. For the Drell-Yan pT spectrum a significant effect from the α s scale choice is observed.
The talk will be based on the Les Houches proceedings: http://arxiv.org/abs/arXiv:1803.07977 contribution: "On the cross-talk of parameter optimization and perturbative variations in event generators" and a connected paper: Eur.Phys.J. C76 (2016) no.12, 665
I discussed combinations of state-of-the art calculations of top-quark pair differential cross sections at hadron colliders in fixed order (NNLO) and resummation (NNLL'). Qualitative insight is given into the issue of factorisation and resummation scale choices for the high-energy tail of the top-pair invariant mass distribution, based on the enhanced contributions of t and u channel...
I was invited to present arXiv:1803.06347 on electroweak gauge boson PDFs. I would like to briefly discuss arXiv:1802.08687 as well, which discusses (the resummation of) electroweak logarithms in inclusive cross sections.
We present prospects for the direct measurement of ratios of differential cross sections for the production of Z and Higgs bosons in proton-proton collisions, using data taken by CMS during the LHC Run II. The aim of the measurement is to study soft and hard gluon emission in the initial state for Higgs and Z production mechanisms. Hence, we focus on variables known to be sensitive to the...
We discuss production of $D$ mesons at high and low energies. The cross section at high-energies is calculated in the $k_t$-factorization or standard (collinear) pQCD approach. The unintegrated gluon distributions are the main ingredient of the $k_t$-factorization approach. Several distributions, in rapidity, transversemomentum, are calculated. The asymmetries observed in production of $D^+...
Drell-Yan dilepton production is a unique reaction which offers high sensitivity to the parton distribution in the hadron, being an important reference process from both experimental and theoretical points of view. Motivated by recent analyses, where forward Drell--Yan production in proton-proton collisions at the LHC has been studied in the high-energy factorization framework, we improve the...
We discuss production of Drell-Yan massive lepton pairs at hadron colliders in framework of the parton Reggeization approach, which includes off-shell initial state effects by the gauge-invariant way. We compare our results for transverse momentum and rapidity spectra as well as for angular coefficients with existing experimental data and perform predictions for NICA collider at the total...
