Showing papers by "Antonio Ereditato published in 2009"
TL;DR: The OPERA neutrino oscillation experiment has been designed to prove the appearance of ντ in a nearly pure νμ beam (CNGS) produced at CERN and detected in the underground Hall C of the Gran Sasso Laboratory, 730 km away from the source as discussed by the authors.
Abstract: The OPERA neutrino oscillation experiment has been designed to prove the appearance of ντ in a nearly pure νμ beam (CNGS) produced at CERN and detected in the underground Hall C of the Gran Sasso Laboratory, 730 km away from the source. In OPERA, τ leptons resulting from the interaction of ντ are produced in target units called bricks made of nuclear emulsion films interleaved with lead plates. The OPERA target contains 150000 of such bricks, for a total mass of 1.25 kton, arranged into walls interleaved with plastic scintillator strips. The detector is split into two identical supermodules, each supermodule containing a target section followed by a magnetic spectrometer for momentum and charge measurement of penetrating particles. Real time information from the scintillators and the spectrometers provide the identification of the bricks where the neutrino interactions occurred. The candidate bricks are extracted from the walls and, after X-ray marking and an exposure to cosmic rays for alignment, their emulsion films are developed and sent to the emulsion scanning laboratories to perform the accurate scan of the event. In this paper, we review the design and construction of the detector and of its related infrastructures, and report on some technical performances of the various components. The construction of the detector started in 2003 and it was completed in Summer 2008. The experiment is presently in the data taking phase. The whole sequence of operations has proven to be successful, from triggering to brick selection, development, scanning and event analysis.
240 citations
University of Geneva1, University of Warsaw2, National and Kapodistrian University of Athens3, Saint Petersburg State University4, Joint Institute for Nuclear Research5, Karlsruhe Institute of Technology6, Hungarian Academy of Sciences7, Jagiellonian University8, University of Silesia in Katowice9, Stony Brook University10, University of Cape Town11, University of Bern12, Eötvös Loránd University13, Jan Kochanowski University14, Goethe University Frankfurt15, Warsaw University of Technology16, Sofia University17, ETH Zurich18, Frankfurt University of Applied Sciences19, University of Bergen20
85 citations
05 Jan 2009
TL;DR: In this paper, a detailed study of the expected performance of the ATLAS detector is presented, together with the reconstruction of tracks, leptons, photons, missing energy and jets, along with the performance of b-tagging and the trigger.
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.
78 citations
TL;DR: The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrinos oscillations in appearance mode through the study of $
u_\mu\to
u_ \tau$ oscillations.
Abstract: The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in appearance mode through the study of $
u_\mu\to
u_\tau$ oscillations. The apparatus consists of an emulsion/lead target complemented by electronic detectors and it is placed in the high energy long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. Runs with CNGS neutrinos were successfully carried out in 2007 and 2008 with the detector fully operational with its related facilities for the emulsion handling and analysis. After a brief description of the beam and of the experimental setup we report on the collection, reconstruction and analysis procedures of first samples of neutrino interaction events.
52 citations
University of Tokyo1, University of Wrocław2, ETH Zurich3, University of Milan4, University of Geneva5, Paris Diderot University6, Fermilab7, University of Granada8, CERN9, Spanish National Research Council10, University of Bern11, Toho University12, Sofia University13, Hamamatsu Photonics14, Nagoya University15, Russian Academy of Sciences16, University of Padua17, Stony Brook University18, Keele University19, University of Pavia20, KEK21, College of William & Mary22, Autonomous University of Barcelona23, Imperial College London24, Science and Technology Facilities Council25, University of Oxford26
TL;DR: In this paper, the baseline detector options for each possible neutrino beam are defined as follows: 1. A very massive (Megaton) water Cherenkov detector is the baseline option for a sub-GeV Beta Beam and Super Beam facility.
Abstract: This report summarises the conclusions from the detector group of the International Scoping Study of a future Neutrino Factory and Super-Beam neutrino facility. The baseline detector options for each possible neutrino beam are defined as follows: 1. A very massive (Megaton) water Cherenkov detector is the baseline option for a sub-GeV Beta Beam and Super Beam facility. 2. There are a number of possibilities for either a Beta Beam or Super Beam (SB) medium energy facility between 1-5 GeV. These include a totally active scintillating detector (TASD), a liquid argon TPC or a water Cherenkov detector. 3. A 100 kton magnetized iron neutrino detector (MIND) is the baseline to detect the wrong sign muon final states (golden channel) at a high energy (20-50 GeV) neutrino factory from muon decay. A 10 kton hybrid neutrino magnetic emulsion cloud chamber detector for wrong sign tau detection (silver channel) is a possible complement to MIND, if one needs to resolve degeneracies that appear in the δ-θ13 parameter space.
32 citations
TL;DR: In this article, the authors describe the design, realization and operation of a prototype liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the development of a novel online monitoring and calibration system exploiting UV laser beams.
Abstract: This paper describes the design, realization and operation of a prototype liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the development of a novel online monitoring and calibration system exploiting UV laser beams. In particular, the system is intended to measure the lifetime of the primary ionization in LAr, in turn related to the LAr purity level. This technique could be exploited by present and next generation large mass LAr TPCs for which monitoring of the performance and calibration play an important role. Results from the first measurements are presented together with some considerations and outlook.
31 citations
TL;DR: In this article, the authors describe the design, realization and operation of a prototype liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the development of a novel online monitoring and calibration system exploiting UV laser beams.
Abstract: This paper describes the design, realization and operation of a prototype liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the development of a novel online monitoring and calibration system exploiting UV laser beams. In particular, the system is intended to measure the lifetime of the primary ionization in LAr, in turn related to the LAr purity level. This technique could be exploited by present and next generation large mass LAr TPCs for which monitoring of the performance and calibration plays an important role. Results from the first measurements are presented together with some considerations and outlook.
24 citations
01 May 2009
TL;DR: In this paper, the Hidden-Valley scenario is used for exploring the challenges posed by long-lived particles with long decay paths to the trigger and the reconstruction capabilities of the ATLAS apparatus.
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.
11 citations
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TL;DR: The feasibility of a next generation neutrino observatory in Europe is being considered within the LAGUNA design study as mentioned in this paper, which aims at the comprehensive and coordinated technical assessment of each site, at a coherent cost estimation, and at a prioritization of the sites within the summer 2010.
Abstract: The feasibility of a next generation neutrino observatory in Europe is being considered within the LAGUNA design study. To accommodate giant neutrino detectors and shield them from cosmic rays, a new very large underground infrastructure is required. Seven potential candidate sites in different parts of Europe and at several distances from CERN are being studied: Boulby (UK), Canfranc (Spain), Frejus (France/Italy), Pyhasalmi (Finland), Polkowice-Sieroszowice (Poland), Slanic (Romania) and Umbria (Italy). The design study aims at the comprehensive and coordinated technical assessment of each site, at a coherent cost estimation, and at a prioritization of the sites within the summer 2010.
7 citations
01 Jan 2009
TL;DR: In this article, the authors present a survey of the state-of-the-art methods to solve the problem of how to find the optimal solution to the problem in terms of time and space.
Abstract: N. Abgrall22, A. Aduszkiewicz23, B. Andrieu11, T. Anticic13, N. Antoniou18, J. Argyriades22, A. G. Asryan15, B. Baatar9, A. Blondel22, J. Blumer5, L. Boldizsar10, A. Bravar22, J. Brzychczyk8, A. Bubak12 S. A. Bunyatov9, K.-U. Choi12, P. Christakoglou18, P. Chung16, J. Cleymans1, D. A. Derkach15, F. Diakonos18, W. Dominik23, J. Dumarchez11, R. Engel5, A. Ereditato20, G. A. Feofilov15, Z. Fodor10, A. Ferrero22, M. Gaździcki17,21, M. Golubeva6, K. Grebieszkow24, A. Grzeszczuk12, F. Guber6, T. Hasegawa7, A. Haungs5, S. Igolkin15, A. S. Ivanov15, A. Ivashkin6, K. Kadija13, N. Katrynska8, D. Kielczewska23, D. Kikola24, J. Kisiel12 T. Kobayashi7, V. I. Kolesnikov9, D. Kolev4, R. S. Kolevatov15, V. P. Kondratiev15, S. Kowalski12 A. Kurepin6, R. Lacey16, A. Laszlo10, V. V. Lyubushkin9, Z. Majka8, A. I. Malakhov9, A. Marchionni2, A. Marcinek8, I. Maris5 V. Matveev6, G. L. Melkumov9, A. Meregaglia2, M. Messina20, P. Mijakowski14, M. Mitrovski21, T. Montaruli18,∗, St. Mrowczynski17, S. Murphy22, T. Nakadaira7, P. A. Naumenko15, V. Nikolic13, K. Nishikawa7, T. Palczewski14, G. Palla10, A. D. Panagiotou18, W. Peryt24, R. Planeta8, J. Pluta24, B. A. Popov9, M. Posiadala23, P. Przewlocki14, W. Rauch3, M. Ravonel22, R. Renfordt21, D. Rohrich19, E. Rondio14, B. Rossi20, M. Roth5, A. Rubbia2, M. Rybczynski17, A. Sadovsky6, K. Sakashita7, T. Schuster21, T. Sekiguchi7, P. Seyboth17, M. Shibata7, A. N. Sissakian9, E. Skrzypczak23, M. Slodkowski24, A. S. Sorin9, P. Staszel8, G. Stefanek17, J. Stepaniak14, C. Strabel2, H. Stroebele21, T. Susa13, I. Szentpetery10, M. Szuba24, M. Tada7, A. Taranenko16, R. Tsenov4, R. Ulrich5, M. Unger5, M. Vassiliou18, V. V. Vechernin15, G. Vesztergombi10, Z. Wlodarczyk17, A. Wojtaszek17, W. Zipper12