KROWIG Version 1.0: Interfacing KRONOS and HERWIG or Higher Order Electromagnetic Radiative Corrections at HERA with Hadronic Final States

This manual describes version 1.0 of the Monte Carlo event generator KROWIG for deep inelastic lepton hadron scattering at HERA. KROWIG combines the implementation of QED radiative corrections in KRONOS with the QCD parton showers and cluster fragmentation of HERWIG.Comment: 22 pages, DESY 92-09

Automated Calculation and Simulation Systems

I briefly summarize the parallel sessions on Automated Calculation and Simulation Systems for high energy particle physics phenomenology at ACAT 2002 (Moscow State University, June 2002) and present a short overview over the current status of the field and try to identify the important trends.Comment: 4 pages, LaTeX, to appear in the proceedings of ACAT 200

Production of Dark Matter in Warped Higgsless Models with Composite Sector Supersymmetry

We explore the LHC phenomenology of an extension of warped higgsless models. The model is supersymmetric in the bulk and on the IR brane as introduced in [arXiv:0805.1379], corresponding to an emergence of a supersymmetric spectrum in the composite sector of the higgsless model. In particular, the lightest neutralino is rendered stable by an R parity and serves as a realistic cold dark matter candidate. The observation of missing energy signals at the LHC from LSP and NLSP production in association with third generation quarks is discussed based on simulations using WHIZARD.Comment: 21 pages, LaTeX, figures include

The Noncommutative Standard Model and Polarization in Charged Gauge Boson Production at the LHC

We study the pair production of charged gauge bosons at the LHC in a noncommutative extension of the standard model. We use angular distributions in the decays of the gauge bosons to partially reconstruct polarized cross sections. We use this, together with CP considerations, to construct more sensitive observables that allow to separate space-time from space-space noncommutativities.Comment: 13 pages, 8 figures; minor cosmetic change; clarifying remarks on our Feynman rules, add explicit calculation of Ward identities to appendi

Discovery Prospects of an Almost Fermiophobic W' in the Three-Site Higgsless Model at the LHC

In extensions of the Standard Model with compactified extra dimensions, perturbative unitarity of the longitudinal gauge bosons is maintained through the contribution of heavy KK excitations of the gauge fields, without the necessity of introducing a Higgs field. The Three-Site Higgsless Model represents a minimal approach in this respect, containing just one extra set of heavy gauge bosons Z'/W' in the spectrum. While the Z' can have robust couplings to SM fermions and hence may be detected within the first 1-20 1/fb of LHC data at 14 TeV, the coupling of the W' to light fermions is suppressed and depends on the model parameters. Expanding on previous parton level studies, we determine discovery thresholds of the W' in s-channel Drell-Yan production at the LHC for W' masses of 380, 500 and 600 GeV, combining analyses of the semileptonic final states lljj, lnjj and the leptonic final state lnll including fast detector simulation.Comment: 19 pages Latex. Accepted for publicatio

O'Mega: An Optimizing Matrix Element Generator

We sketch the architecture of O'Mega, a new optimizing compiler for tree amplitudes in quantum field theory, and briefly describe its usage. O'Mega generates the most efficient code currently available for scattering amplitudes for many polarized particles in the Standard Model and its extensions.Comment: 29 pages, LaTe