Showing papers by "Ludovico Pontecorvo published in 2001"
01 Apr 2001-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, a review of the methods used to calibrate and reconstruct energy and timing is reported, focusing on the calibration procedures developed using the 2.4 pb−1 collected in 1999.
Abstract: The main aim of the KLOE experiment at DAΦNE, the Frascati φ-factory, is to study CP violation in the K0– K 0 system. Requirements on shower detection are very stringent. An hermetic, lead-scintillating fiber sampling calorimeter has been chosen and built. A review of the methods used to calibrate and reconstruct energy and timing is reported in this paper. Emphasis is given to the calibration procedures developed using the 2.4 pb−1 collected in 1999. An energy resolution of 5.7%/ E/ GeV is achieved together with a linearity in energy response better than 1% above 50 MeV. A time resolution of ∼54 ps / E/ GeV is also measured on samples of radiative Bhabha and Φ decays.
12 citations
01 Apr 2001-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, a double-level trigger system was developed for the KLOE experiment and the decision was based on the combined information of the electromagnetic calorimeter and the drift chamber.
Abstract: A double-level trigger system has been developed for the KLOE experiment. Custom electronics asserts a trigger in a 2 μs decision time. The decision is based on the combined information of the electromagnetic calorimeter and the drift chamber. The entire trigger system is continuously monitored, and data flowing from the trigger system have allowed both an efficient online monitoring of the detector and an online luminosity measurement.
7 citations
01 Apr 2001-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, a quality control system for the ATLAS muon detector is presented, which includes requirements on drift-tubes wire tensioning, leak current, gas leak and wire positioning.
Abstract: The physics at LHC imposes very severe requirements on the ATLAS muon detector, which translates into stringent requirements on drift-tubes wire tensioning, leak current, gas leak and wire positioning. In order to verify all these parameters prior to chamber construction, a dedicated quality control system was completely designed and built by our groups.
5 citations
01 Jan 2001
TL;DR: In this paper, the authors report on the measurement of the hadronic cross section below 1 GeV at the electron-positron-collider DA NE, using the multiple purpose detector KLOE.
Abstract: We report on the measurement of the hadronic cross section below 1 GeV at the electron-positron-collider DA NE, using the multiple purpose detector KLOE. The radiative return, which is due to initial state radiation (e+e− → γ + hadrons), allows us to obtain the cross section for variable center-of-mass-energies of the hadronic system from the 2mπ threshold up to 1.02 GeV. This measurement can be performed while DA NE is running with a fixed accelerator energy on theφ mass (1.02 GeV). For the exclusive process e+e− → π+π−γ , the status of the analysis and first preliminary results of the invariant mass spectrum of the two-pion-state are presented.
2 citations
01 Jan 2001
TL;DR: In this article, the authors report on the measurement of the hadronic cross section below 1GeV at the electron-positron-collider DAPHNE, using the multiple purpose detector KLOE.
Abstract: We report on the measurement of the hadronic cross section below 1GeV at the electron-positron-collider DAPHNE, using the multiple purpose detector KLOE. The radiative return, which is due to initial state radiation (e+ e- \to gamma + hadrons), allows us to obtain the cross section for variable center-of-mass-energies of the hadronic system from the 2m_pi threshold up to 1.02GeV. This measurement can be performed while DAPHNE is running with a fixed accelerator energy on the phi mass (1.02 GeV). For the exclusive process e+ e- \to pi+ pi- gamma, the status of the analysis and first preliminary results of the invariant mass spectrum of the two-pion-state are presented.
1 citations