arXiv subjects
Publications and source records attributed to Nabil Ghodbane.
A large Time Projection Chamber is proposed as part of the tracking system for a detector at the TESLA electron positron linear collider. Different ongoing R&D studies are reviewed, stressing progress made on a new type readout technique based on Micro-Pattern Gas Detectors.
A comparative study of supersymmetric particle spectra calculated by the programs ISAJET, SUSYGEN and PYTHIA is presented for various SUSY scenarios defined at the Snowmass 2001 workshop.
We reanalyze the results of the chargino searches at LEP (on the basis of the DELPHI 189 GeV data sample), including the possibility of complex MSSM parameters. We point out the possible differences between the complex- and real-parameter analysis. We check that the regions excluded by ``standard'' analyses remain generally robust against the introduction of complex parameters, with the exception of light sneutrino and low $\tanβ$ scenario, where additional constraints like those given by the $Z^0$ width or electric dipole moment measurements are necessary.
The Monte Carlo program \texttt{SUSYGEN}, initially designed for computing distributions and generating events for supersymmetric particle production in $e^+e^-$ collisions, has now been upgraded to study supersymmetric processes at linear colliders by the inclusion of beamstrahlung, beam polarization, spin correlations and complex couplings including CP violating phases. It continues to offer, in the new context, the possibility to study the production and decay of supersymmetric particles within the most general minimal standard supersymmetric model (MSSM), the minimal supergravity model (MSUGRA) or the gauge mediated supersymmetry breaking model (GMSB), with or without assuming R-parity conservation.