The Laboratories de Physique Nuclear et de Haute' s Energies of Paris is committed in the preparation of one experiment on the future Large Matron Collier at CERN. The Atlas (Air Torpid Loc Apparatus System) experiment is a major detector devoted to the search of the Higgs boson and to the exploration of new physics, beyond the current Standard Model of the electro weak and strong interactions. The Higgs boson is a new particle, yet not found, which could explain the origin of the mass of the elementary particles. The direct observation of new particles will be done through their decay products (electrons, photons...) and energy balance. The object-oriented software for the reconstruction of particles within the sub-detectors of Atlas requires the development of tools capable of analysis on massive events, on large amount of data, using elaborate algorithms for the identification of physics channels. In the following years, the highest attention will be given to the reconstruction and identification of photons and electrons as well as the validation of this software with realistic test beam data. In particular, the laboratory intends to develop tools to help to calibrate the electromagnetic calorimeter, which is a fundamental sub-detector of Atlas. This requires the identification of low-momentum electrons, by combining information from two distinct detectors: the inner detector and the electromagnetic calorimeter.
The laboratory is also strongly involved in the test beam performed on full-scale series modules of the future detector. The applicant researcher is expected to take responsibilities in these activities. Such activities require the best knowledge of the detectors and physics simulations. They therefore represent the possibility for young researchers to train and gain in expertise in instrumental and software techniques at the leading edge of the technical knowledge.
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