Glenn A. Ladinsky

Nonperturbative regime in QCD resummation for gauge boson production at hadron colliders

We study the nonperturbative functions in the Collins-Soper-Sterman resummation formalism by examining Drell-Yan data in both fixed target and collider experiments and then predict the transverse momentum distributions of the [ital W][sup [plus minus]] and [ital Z][sup 0] bosons at the Fermilab Tevatron. Our results differ from those in the literature and agree better with published CDF data. Using statistical arguments, we find a 1 fb[sup [minus]1] luminosity at the Tevatron should be able to provide useful constraints on the nonperturbative functions.

CERN LHC analysis of the strongly interacting WW system: Gold-plated modes.

We study the gold-plated purely leptonic signal and background rates at the CERN LHC for the {ital ZZ}, {ital W}{sup +}{ital W}{sup {minus}}, {ital W}{sup {plus_minus}}{ital Z}, and {ital W}{sup {plus_minus}}{ital W}{sup {plus_minus}} final states associated with strongly interacting electroweak symmetry breaking. We work at an energy of {radical}{ital s} =14 TeV, and develop a combination of back-to-back leptonic, central-jet-vetoing, and forward-jet-tagging cuts that suppresses the standard-model backgrounds. We find that the LHC with an annual luminosity of 100 fb{sup {minus}1} will achieve a reasonably good sensitivity to the physics of strongly interacting electroweak symmetry breaking.

Measuring transversity densities in singly polarized hadron-hadron and lepton-hadron collisions

We show how the transverse polarization of a quark initiating a jet can be probed by the azimuthal distribution of two hadrons (of large z) in the jet. This permits a twist-2 asymmetry in hard processes when only one of the initial particles is polarized transversely. Applications to hadron-hadron and lepton-hadron scattering are discussed.

New fits for the non-perturbative parameters in the CSS resummation formalism

We update the non-perturbative function of the Collins-Soper- Sterman resummation formalism in hadron collisions. Two functional forms in impact parameter space are considered, one with a pure Gaussian form with two parameters and the other with an additional linear term. The results for the two parameter fit are found to be g1=0.24+0.08-0.07 GeV^2, g2=0.34+0.07-0.08 GeV^2. The results for the three parameter fit are g1=0.15+004-0.03 GeV^2, g2=0.48+0.07-0.05 GeV^2, and g3=-0.58+0.26-0.20 GeV^-1. We discuss the potential for the full Tevatron Run I Z boson data for further testing of the universality of the non-perturbative function.

Probe of new physics in top-quark pair production at e-e+ colliders.

We describe how to probe new physics through examination of the form factors describing the

Production of two photons and a jet through gluon fusion

Z\ensuremath{-}t\ensuremath{-}\overline{t}

Gauge-boson scattering signals at the CERN LHC.

couplings via the scattering process

The Strongly interacting W W system: Gold plated modes

{e}^{\ensuremath{-}}{e}^{+}\ensuremath{\rightarrow}t\overline{t}

Top-quark polarization at the Fermilab Tevatron.

. We focus on experimental methods on how the top-quark momentum can be determined and show how this can be applied to select polarized samples of

On pi - pi correlations in polarized quark fragmentation using the linear sigma model

t\overline{t}