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G. A. Ladinsky

Publications and source records attributed to G. A. Ladinsky.

8 recordsLinked to original sources
arXiv1995

LHC Analysis of the Strongly Interacting $WW$ System: Gold-Plated Modes

We study the gold-plated purely leptonic signal and background rates at the LHC for the $ZZ,$ $W^{+}W^-,$ $W^\pm Z$ and $W^\pm W^\pm$ final states associated with strongly interacting electroweak symmetry breaking. We work at an energy of $\sqrt s = 14$ TeV, and develop a combination of back-to-back leptonic, central-jet-vetoing and forwaring cuts that suppresses the Standard-Model backgrounds. We find that the LHC with an annual luminosity of 100 fb$^{-1}$ will achieve a reasonably good sensitivity to the physics of strongly interacting electroweak symmetry breaking.

hep-ph↗
arXiv1994

The 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 examing Drell--Yan data in both fixed target and collider experiments and then predict the transverse momentum distributions of the $W^\pm$ and $Z^0$ bosons at the Tevatron. Our results differ from that in the literature and agree better with published CDF data. Using statistical arguments, we find a $1\,$fb${}^{-1}$ luminosity at the Fermilab Tevatron should be able to provide useful constraints on the nonperturbative functions.

hep-ph↗
arXiv1993

A 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 Ztt couplings via the scattering process e^-e^+->t+tbar. 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 $t\bar{t}$ pairs through the angular correlations in the final state leptons. We also study the dependence on the energy and luminosity of an \ee\ collider to probe a CP violating asymmetry at the $10^{-2}$ level.}

hep-ph↗
arXiv1993

On Top Quark Polarization and Proposed Techniques for Measuring $m_t$ at Hadron Colliders

Measuring the top quark mass in its semileptonic decay mode, $t ->be^+ν$ ($b -> μ^- + X$), through the mass distribution of the $e^+$--$μ^-$ pair has been shown to provide a good measurement of the top quark mass with an uncertainty of $1.6\%$ for $m_t=150,250\,$GeV at the SSC. Here it is demonstrated that an uncertainty in the polarization of the top quark can add an additional uncertainty of about $3%$ in the mass. [Talk presented at the Workshop on Physics at Current Accelerators and the Supercollider held at the Argonne National Laboratory, Argonne, Illinois, 2-5 June 1993.]

hep-ph↗
arXiv1993

The Strongly Interacting $WW$ System: Gold--Plated Modes

In this paper we survey the signals and backgrounds for a strongly-interacting electroweak symmetry breaking sector at hadron supercolliders in the TeV region. We study the process pp->WWX, and compute the rates for the ``gold-plated'' channels, where W^{+/-}->l^{+/-}νand Z -> l^+l^- (l = e,μ), for a wide variety of models. Using a forward jet-tag, a central jet-veto and a back-to-back lepton cut to suppress the Standard Model backgrounds, we demonstrate that the SSC and LHC have substantial sensitivity to strong interactions in the electroweak symmetry breaking sector.

hep-ph↗
arXiv1993

Leading Electroweak Corrections to the Production of Heavy Top Quarks at Hadron Colliders

We calculate the electroweak corrections of the order $O({m_t^2\over v^2})$ to the QCD production of $t\bar{t}$ pairs via $q+qbar->t+tbar$ at hadron colliders and show that these corrections to the total production rate are small. This correction can be characterized as increasing the cross section most near the threshold region, where top quark signals are important, while the corrections become negative at higher $t\bar{t}$ energies where the top quark is a background for heavy Higgs boson searches or investigations involving the strongly interacting longitudinal $W$ system. The polarization of the $t\bar t$ pair is also discussed, including the effect that this has on proposed techniques for measuring the the top quark mass.

hep-ph↗