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L3 Miscellaneous

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2005-11-02
05:02
Calibration and monitoring for crystal calorimetry / Zhu, Ren Yuan
Crystal calorimetry provides excellent energy resolution in high energy and nuclear physics. The light output of heavy crystal scintillators, however, suffers from not negligible damage in radiation environment. [...]
2005 - Published in : Nucl. Instrum. Methods Phys. Res., A 537 (2005) 344-348

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2005-01-22
06:02
Precision tests of the standard model in LEP experiments / Olshevskii, A G (Joint Inst for Nucl Res, Dubna, Russia)
Measurements performed in experiments at LEP are presented. The combined measurements are in good agreement with the theoretical predictions. [...]
2003 - Published in : Phys. Part. Nucl. 34 (2003) 557-76

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2005-01-22
06:02
Investigation of induced radioactivity in the CERN Large Electron Positron collider for its decommissioning / Silari, Marco ; Ulrici, Luisa
The future installation of the Large Hadron Collider in the tunnel formerly housing the Large Electron Positron collider (LEP) required the dismantling of the latter after 11-year operation. As required by the French legislation, an extensive theoretical study was conducted before decommissioning to establish the possible activation paths both in the accelerator and in the four experiments (L3, ALEPH, OPAL and DELPHI) installed around the ring. [...]
2004 - Published in : Nucl. Instrum. Methods Phys. Res., A 526 (2004) 510-536

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2004-12-01
05:15
Experience with the L3 vertex drift chamber at LEP / Anderhub, H ; Beissel, F ; Betev, B L ; Biland, A ; Böhm, A ; Bourilkov, D ; Camps, C ; Commichau, V ; Djambazov, L ; Göttlicher, P et al.
The vertex drift chamber of the L3 Experiment at LEP, based on the time expansion principle, was in operation from the start-up of LEP in 1989 until the shutdown of LEP in 2000. The gas mixture used was 80% CO//2 and 20% i-C//4H//1//0 at a pressure of 1200 mbar. [...]
2003 - Published in : Nucl. Instrum. Methods Phys. Res., A 515 (2003) 31-36

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2004-12-01
05:15
Results on long-term performances and laboratory tests of the L3 RPC system at LEP / Alviggi, M G ; Carlino, G ; Conventi, F ; De Asmundis, R ; Della Pietra, M ; Della Volpe, D ; Patricelli, S ; Paolucci, P ; Piccolo, D ; Sciacca, C et al.
The RPC detectors in the L3 experiment at LEP work as a trigger system for the Forward-Backward Muon Spectrometer. It consists of 192 bi-gap RPCs working in streamer mode. [...]
2003 - Published in : Nucl. Instrum. Methods Phys. Res., A 515 (2003) 328-334

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2004-03-24
01:56
Results of long-term performance and subsequent laboratory tests of RPCs of the L3 forward-backward muon spectrometer / Alviggi, M G ; Caprio, M A ; Carlino, G ; Conventi, F ; De Asmundis, R ; Della Pietra, M ; Della Volpe, D ; Iengo, P ; Paolucci, P ; Patricelli, S et al.
The RPC chambers in the L3 forward-backward muon spectrometer have been operational from 1994 to the end of LEP running. After dismantling of the L3 detector some of the RPCs modules have been transported to Napoli where their performance has been re-measured with cosmic rays. [...]
2003 - Published in : Nucl. Instrum. Methods Phys. Res., A 508 (2003) 159-165

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2004-01-22
01:16
Review of the Properties of the W Boson at LEP, and the Precision Determination of its Mass / Ströhmer, R (Munich U.)
We review the precision measurement of the mass and couplings of the W Boson at LEP. The total and differential W+W- cross section is used to extract the WWZ and WWgamma couplings. [...]
hep-ph/0401146.- 2003 - 97 p. - Published in : Int. J. Mod. Phys. A 18 (2003) 5127-5220 Access to fulltext document: PDF; External link: hep-ph/0401146 PDF

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2003-06-18
12:39
Quarks and gluons : tests of QCD in $e^{+}e^{-}$ annihilations / Duchesneau, D ; Field, J H ; Jeremie, H
This article gives an overview of the main experimental tests of perturbative QCD performed at LEP. It covers the following topics: determination of alpha /sub s/ from event shapes, tests of flavour independence of alpha /sub s/, studies of heavy quark mass effects, differences between quark and gluon jet fragmentation and study of the triple gluon vertex. [...]
2002 - Published in : C. R. Acad. Sci. Paris: 3 (2002) , no. 9, pp. 1211-22

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2003-06-18
12:39
High spatial resolution detectors and particle lifetime measurements at LEP / Coyle, P ; Schneider, O
The design and performance of the LEP Si vertex detectors are described. Their application to the measurement of the tau -lepton and b-hadron lifetimes is discussed and the current status of these measurements is reviewed. [...]
2002 - Published in : C. R. Acad. Sci. Paris: 3 (2002) , no. 4, pp. 1143-54 Fulltext: PDF;

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2003-06-18
12:39
Direct search for the standard model Higgs boson / Janot, Patrick (CERN) ; Kado, M
For twelve years, LEP revolutionized the knowledge of electroweak symmetry breaking within the standard model, and the direct discovery of the Higgs boson would have been the crowning achievement. Searches at the Z resonance and above the W/sup +/W/sup -/ threshold allowed an unambiguous lower limit on the mass of the standard model Higgs boson to set be at 114.1 GeV.c/sup -2/. [...]
2002 - Published in : C. R. Acad. Sci. Paris: 3 (2002) , no. 4, pp. 1193-1202

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