Showing papers by "Ahmet Bingul published in 2009"

Expected performance of the ATLAS experiment - detector, trigger and physics

Abstract: A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. The study comprises a series of notes based on simulations of the detector and physics processes, with particular emphasis given to the data expected from the first years of operation of the LHC at CERN.

Triggering on Long-Lived Neutral Particles in the ATLAS Detector

Abstract: Neutral particles with long decay paths that decay to many-particle final states represent, from an experimental point of view, a challenge both for the trigger and for the reconstruction capabilities of the ATLAS apparatus. The Hidden Valley scenario serves as an excellent setting for the purpose of exploring the challenges to the trigger posed by long-lived particles.

Residual Bose-Einstein Correlations and the Söding Model

Abstract: Bose–Einstein correlations between identical pions close in phase-space is thought to be responsible for the observed distortion in mass spectra of non-identical pions. For example in the decays ρ → ππ and ρ → ππ, such distortions are a residual effect where the pions from the ρ decay interact with other identical pions that are close in phase-space. Such interactions can be significant in, for example, hadronic decays of Z bosons where pion multiplicities are high, and resonances such as ρ mesons decay with a very short lifetime thereby creating pions that are close to prompt pions created directly. We present the Söding model and show that it has been used successfully to model distortions in ππ mass spectra in hadronic Z decays recorded by ALEPH.