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Bodo Lampe

Publications and source records attributed to Bodo Lampe.

27 records · Page 2Linked to original sources
arXiv1998

A low-energy compatible SU(4)-type Model for Vector Leptoquarks of Mass <= 1 TeV

The Standard Model is extended by a SU(2)L singlet of vector leptoquarks. An additional SU(4) gauge symmetry between right-handed up quarks and right-handed leptons is introduced to render the model renormalizable. The arrangement is made in such a way that no conflict with low energy restrictions is encountered. The SU(2)L singlet mediates interactions between the right-handed leptons and up type quarks for which only moderate low energy restrictions M(LQ)/g(LQ) > few hundred GeV exist. We cancel the anomalies of the model and furthermore argue that the inequality g(LQ) > g(QCD) is a general feature of consistent vector leptoquark models. Although our model is not relevant for HERA, it is interesting per se as a description of leptoquarks of mass < 1 TeV consistent with all low-energy requirements.

hep-ph↗
arXiv1998

Complete Description of Polarization Effects in Top Quark Decays Including Higher Order QCD Corrections

The complete set of matrix elements for all polarization configurations in top quark decays is presented including higher order QCD corrections. The analysis is done in the framework of the helicity formalism. The results can be used in a variety of circumstances, e.g. in the experimental analysis of top quark production and decay at Tevatron, LHC and NLC. Relations to LEP1 and LEP2 physics are pointed out.

hep-ph↗
arXiv1997

New Interactions in Top Quark Production and Decay at the Tevatron Upgrade

New interactions in top-quark production and decay are studied under the conditions of the Tevatron upgrade. Studying the process q qbar --> t tbar --> b mu nu tbar, it is shown how the lepton rapidity and transverse energy distribution are modified by nonstandard modifications of the g-t-tbar and the t-b-W vertex.

hep-ph↗
arXiv1997

The First Moment of delta g(x) -- a Comparative Study

The sensititivity of various future polarization experiments to the first moment Delta g of the polarized gluon density is elucidated in detail. It is shown to what extent the first moment can be extracted from the future data as compared to the higher moments. We concentrate on two processes which in the near future will become an important source of information on the polarized gluon density, namely the photoproduction of open charm to be studied at CERN (COMPASS) and SLAC and the production of direct photons at RHIC.

hep-ph↗
arXiv1996

Directions in High Energy Physics

The future goals of particle physics are classified from a theorist's point of view. The prospects of mass and mixing angle determination and of the top quark and Higgs boson discovery are discussed. It is shown that the most important progress will come from LHC and NLC. These machines should be planned and developed as quickly as possible.

hep-ph↗
arXiv1996

QCD Corrections to W Pair Production at LEP200

One loop QCD corrections to hadronic W decay are calculated for arbitrary W polarizations . The results are applied to W pair production and decay at LEP200. We focus on the corrections to angular distributions with particular emphasis on azimuthal distributions and correlations. The relevance of our results to the experimental determination of possible nonstandard triple gauge bosons interactions is discussed.

hep-ph↗
arXiv1996

LEP1-Quick

The theoretical background of the electroweak precision measurements at LEP1 is reviewed. The presentation is compact but specific enough to understand all details.

hep-ph↗
arXiv1995

Top Quark Physics -- a Popular Review

The top quark has been discovered at FERMILAB last year. The following features of top quark physics will be discussed in this article: the top quark in the standard model production and decay of the top quark in proton collisions (direct evidence for top) virtual effects of top quarks in electroweak observables (indirect evidence for top)

hep-ph↗