Modelling CC neutrino cross sections in the few GeV energy region

Selected problems in modelling neutrino-nucleon and -nuclei cross sections in the neutrino energy region of the few GeV are reviewed.Comment: Presented by J.T. Sobczyk at the Cracow Epiphany Conference on Neutrinos and Dark Matter, Jan. 5-8, 2006, Cracow, Polan

Spin properties of top quark pairs produced at hadron colliders

We discuss the spin properties of top quark pairs produced at hadron colliders at next-to-leading order in the coupling constant alpha_s of the strong interaction. Specifically we present, for some decay channels, results for differential angular distributions that are sensitive to t tbar spin correlations.Comment: Invited talk given by A. Brandenburg at the Cracow epiphany conference on heavy flavours, 3 - 6 January 2003, Cracow, Polan

Calculation of QCD NLO Splitting Functions in the light-cone gauge: a new regularization prescription

We report on the progress in calculating NLO DGLAP splitting functions for $x<1$ using the New Principal Value prescription, which is a modification of the standard Principal Value approach proposed by Curci, Furmanski and Petronzio in 1980. The new prescription reproduces the standard results on the inclusive (integrated) level, but simplifies individual contributions and restricts the cancellations between real and virtual diagrams which makes it useful for Monte Carlo simulations.Comment: Presented by O.Gituliar at XX Cracow Epiphany Conference, Cracow (Poland), 8--10 Jan 201

Colored Particle Production in New Physics at NLO QCD and Its Matching to Parton Showers

In this talk, I show the automated Monte Carlo simulations at next-to-leading order in QCD as well as its matching to parton showers are already feasible within the framework of \MG5aMC. I briefly overview the recent activities and take the colored particle production at the LHC as examples. The tools and the models are ready for using by both phenomenologists and experimentalists.Comment: 12 pages, 3 figures, 2 tables, contribution to proceedings of XXIII Cracow EPIPHANY Conference, 9-12 January 2017, IFJ PAN, Cracow, Polan

Q^2-evolution of spin-dependent parton densities

We discuss the NLO evolution of quark transversity densities and of the parton distribution function for linearly polarized gluons in a linearly polarized hadron. A supersymmetric relation between the NLO evolution kernels for transversity and for linear polarization is found. We also study the implications of NLO evolution for Soffer's inequality and the prospects of measuring transversity densities in polarized Drell-Yan at RHIC.Comment: 12 Pages, LaTeX, 4 figures as eps files, Invited talk presented at the `Cracow Epiphany Conference on Spin Effects in Particle Physics and Tempus Workshop', Jan. 9--11, 1998, Cracow, Polan