A technique for directly probing CP violation in the Higgs sector of a multidoublet model using gluon-gluon collisions at the SSC is reviewed.

We discuss how the vacuum model of Celenza and Shakin with a squeezed gluon condensate can explain the existence of an infrared singular gluon propagator frequently used in calculations within the global colour model. In particular, it reproduces a recently proposed QCD-motivated model where low energy chiral parameters were computed as a function of a dynamically generated gluon mass. We show ...

We investigate the two-gluon-exchange model of Pomeron using nonperturbative gluon propagators characterized by a dynamical mass scale. present results for an analysis available $pp$ differential cross section data at TeV energies which accounts masses obtained from non-linear version Schwinger-Dyson equations. show that our two-gluon exchange gives very good description LHC data, provided we d...

Lattice QCD provides a well suited theoretical framework for the study of nonperturbative quantities as a function of the number of colors. Although experimentally inaccessible, QCD for Nc52 and Nc54 is interesting from the theoretical point of view. Recently SU(Nc) Yang-Mills theories were investigated for various Nc by two groups @1,2# with emphasis on the evaluation of string tensions and gl...

I review recent results on soft gluon radiation at large angles. 1 Gribov’s legacy on soft radiation Although the major interest of Vladimir Gribov [1] in QCD was on non-perturbative aspects (notably colour confinement), his work on soft photons or soft pions emission in the pre-QCD era [2] is the basis for understanding general features of perturbative QCD dynamics. In principle soft emission ...

We calculate the linear and circular polarization of gluons radiated off top quarks produced in e + e −-annihilations. For typical top pair production energies at the Next-Linear-Collider (NLC) the degree of linear polarization remains close to its soft gluon value of 100% over almost the whole energy spectrum of the gluon. The circular polarization is largest for maximal gluon energies where t...