Drell-Yan production with the CCFM-K evolution

We discuss the Drell-Yan dilepton production using the transverse momentum dependent parton distributions evolved with the Catani-Ciafaloni-Fiorani-Marchesini-Kwieci\'nski (CCFM-K) equations in the single loop approximation. Such equations are obtained assuming angular ordering of emitted partons (coherence) for $x\sim 1$ and transverse momentum ordering for $x \ll 1$. This evolution scheme also contains the Collins-Soper-Sterman (CSS) soft gluon resummation. We make a comparison with a broad class of data on transverse momentum spectra of low mass Drell-Yan dileptons.Comment: 29 pages, 9 figure

Initial conditions for evolution of double parton distributions

Double parton distribution functions (DPDFs) are used in the QCD description of double parton scattering. The DPDFs evolve with hard scales through relatively new QCD evolution equations which obey nontrivial momentum and valence quark number sum rules. Based on the constructed numerical program, we present results on the QCD evolution of the DPDFs. In particular, we discuss the problem how to specify initial conditions for the evolution equations which exactly fulfill the sum rules.Comment: presented at DIS2013 at Marseilles, France, 22-26 April, 2013, one reference adde

Unintegrated Double Parton Distributions - a Summary

We present main elements of the construction of unintegrated double parton distribution functions which depend on transverse momenta of partons. We follow the method proposed by Kimber, Martin and Ryskin for a construction of unintegrated single parton distributions from the standard parton distribution functions.Comment: presented at "Diffraction 2016", International Workshop on Diffraction in High Energy Physics, Acireale (Catania, Sicily), Sept 2-8 2016, to be published in the conference proceedings by AI

Saturation model of DIS : an update

We present the results of new fits to the recently extracted data on $F_2$ at low $x$ with the GBW saturation model and its modification to cover high values of $Q^2$. We find that the model stands the test of time and gives a good description of the data with slightly modified parameters. All the essential elements of the model, especially the saturation scale, are retained.Comment: 16 pages, 8 figures; v2: several textual changes and additions, Table 2 added, version accepted by JHEP; v3: misprint correcte

Introductory Chapter: Objectives and Scope of Bioeconomy

Industry & industrial studie