ArcAdiA

Study of the ATLAS MDT spectrometer using high energy CERN combined test beam data

Wed, 31 Dec 2008 23:00:00 GMT

Study of the ATLAS MDT spectrometer using high energy CERN combined test beam data Adorisio, C.; Aielli, G.; Alexopoulos, Th.; Alviggi, M.; Amelung, C.; Anastopoulos, Ch.; Avolio, G.; Avramidou, R.; Bachas, K.; Bagnaia, P.; Ball, R.; Lacava, F.; Lancon, E.; Lanza, A.; Laporte, J. -F.; Lellouch, D.; Levin, D. S.; Levinson, L.; Liberti, B.; Lifshitz, R.; Linde, F.; Barisonzi, M.; Luci, C.; Lupu, N.; Maccarrone, G.; Maeno, T.; Mair, K.; Maltezos, S.; Manz, A.; Marchesotti, M.; Meoni, E.; Mikenberg, G.; Baroncelli, Antonio; Mohr, W.; Mohrdieck-Moeck, S.; Nagano, K.; Nicolaidou, R.; Nikolaev, K.; Nikolopoulos, K.; Nisati, A.; Nomoto, H.; Oliver, J.; Orestano, Domizia; Barone, M.; Osborne, L. S.; Ouraou, A.; Palestini, S.; Pasqualucci, E.; Passeri, Antonio; Pastore, F.; Patricelli, S.; Perrino, R.; Petridou, Ch.; Petrucci, Fabrizio; Bauer, F.; Podkladkin, S.; Policicchio, A.; Pomarede, D.; Ponsot, P.; Pontecorvo, L.; Primavera, M.; Rebuzzi, D.; Richter, R.; Rimoldi, A.; Rosati, S.; Bellomo, M.; Rothberg, J.; Sakamoto, H.; Salvatore, D.; Sampsonidis, D.; Santonico, R.; Sasaki, O.; Schricker, A.; Schuh, S.; Schune, P.; Shoa, M.; Benhammou, Y.; Skvorodnev, N.; Sliwa, K.; Camillocci, E. Solfaroli; Spagnolo, S.; Spogli, L.; Strauss, E.; Sugaya, Y.; Tanaka, S.; Tarem, S.; Taylor, F. E.; Bensinger, J.; Todorova, S.; Trigger, I.; Tsiafis, I.; Tsipolitis, G.; Valderanis, Ch.; Valente, P.; Vandelli, W.; van der Graaf, H.; Vari, R.; Veneziano, S.; Beretta, M.; Ventura, A.; Ventura, S.; Vermeulen, J.; Vlachos, S.; Vreeswijk, M.; Yasu, Y.; Wellenstein, H.; Werneke, P.; Wijnen, T.; Wolter, M.; Bianchi, Riccardo Maria; Wotschack, J.; Woudstra, M.; Zema, F.; Zhao, Z.; Zhemchugov, A.; Zhou, B.; Zimmerman, S.; Bianco, M.; Bini, C.; Bobbink, G.; Borisov, A.; Boterenbrood, H.; Boyko, I.; Branchini, Paolo; Brambilla, E.; Brandenburg, G.; Bratzler, U.; Bressler, S.; Brouwer, G.; Cambiaghi, M.; Canale, V.; Caprio, M.; Cardarelli, R.; Cerutti, F.; Chapman, J. W.; Chelkov, G.; Chevalier, L.; Chiodini, G.; Cirilli, M.; Coco, R.; Curatolo, M.; Dai, T.; De Asmundis, R.; Dedovich, D.; Della Pietra, M.; Della Volpe, D.; DeZorzi, G.; Di Ciaccio, A.; DiDomenico, A.; Di Luise, Silvestro; Di Simone, A.; Dris, M.; Dushkin, A.; Ernwein, J.; Esposito, B.; Etzion, E.; Fakhrutdinov, R.; Falciano, S.; Fassouliotis, D.; Ferrari, R.; Formica, A.; Fukunaga, C.; Gaudio, G.; Gazis, Ev.; Giraud, P. -F.; Gorini, E.; Grancagnolo, F.; Gregory, J. A.; Groenstege, H.; da Costa, J. Guimaraes; Guyot, C.; Harel, A.; Hart, R.; Hashemi, K.; Hassani, S.; Herten, G.; Horvat, S.; Hurst, P.; Ichimiya, R.; Lengo, P.; Ikeno, M.; Ioannou, P.; Iodice, Mauro; Ishino, M.; Iwasaki, H.; Kataoka, Y.; Khodinov, A.; Konig, A.; Kortner, O.; Kotov, S.; Kourkoumelis, C.; Kozhin, A.; Krepouri, A.; Kroha, H.; Krumshteyn, Z.; Kurashige, H.; Landgraf, U. 2009-01 Nuclear instruments & methods in physics research section A, Accelerators spectrometers, detectors and associated equipment 598 400-415 In 2004, a combined system test was performed in the H8 beam line atthe CERN SPS with a setup reproducing the geometry of sectors of theATLAS Muon Spectrometer, formed by three stations of Monitored DriftTubes (MDT). The full ATLAS analysis chain Was used to obtain theresults presented in this paper. The basic design performances of theWon Spectrometer were verified. The stability of MDT calibrationconstants, the alignment system using optical devices and high energytracks, as well as the intrinsic sagitta resolution of the MuonSpectrometer were studied and found to agree with expectations. Thereconstruction of muon tracks using the combined information from boththe Inner Detector and the Muon Spectrometer are also presented. (C)2008 Elsevier B.V. All rights reserved.

Construction and performances of a high granularity calorimeter

Tue, 31 Mar 2009 22:00:00 GMT

Construction and performances of a high granularity calorimeter Branchin, Paolo; Ceradini, Filippo; Corradi, Giovanni; Di Micco, Biagio; Loffredo, Salvatore; Passeri, Antonio 2009-04 IEEE Transactions on Nuclear Science 56 394-397 We describe the realization and performance of a prototype high granularity calorimeter built with lead and scintillating fibers. We describe the calorimeter construction and show cosmic ray and electron test beam results obtained with a custom-designed trigger.

Construction and tests of a fine granularity lead-scintillating fibers calorimeter

Wed, 31 Dec 2008 23:00:00 GMT

Construction and tests of a fine granularity lead-scintillating fibers calorimeter Branchini, Paolo; Ceradini, Filippo; Corradi, Giovanni; Di Micco, Biagio; Passeri, Antonio 2009-01 Journal of Physics: Conference Series 160 1-8 We report the construction and the tests of a small prototype of the lead-scintillating fiber calorimeter of the KLOE experiment, instrumented with multianode photomultipliers to obtain a 16 times finer readout granularity. The prototype is 15 cm wide, 15 radiation lengths deep and is made of 200 layers of fibers 50 cm long. On one side it is read out with an array of 3×5 multianode photomultipliers Hamamatsu type R8900-M16, each segmented with 4×4 anodes, the read out granularity being 240 pixels of 11×11 mm2 corresponding to about 64 scintillating fibers each. These are interfaced to the 6×6 mm2 pixeled photocathode with truncated pyramid light guides made of Bicron BC-800 plastic to partially transmit the UV light. Each photomultiplier provides also an OR of the 16 last dynodes that is used for trigger. The response of the individual anodes, their relative gain and cross-talk has been measured with the light (440 nm) of a laser illuminating only few fibers on the side opposite to the readout. We finally present the first results of the calorimeter response to cosmic rays in autotrigger mode.

Calibration and performances of the KLOE calorimeter

Wed, 31 Dec 2008 23:00:00 GMT

Calibration and performances of the KLOE calorimeter Ambrosino, F.; Antonelli, A.; Antonelli, M.; Archilli, F.; Bacci, Cesare; Beltrame, P.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocchetta, Simona Serena; Bossi, F.; Branchini, Paolo; Campana, P.; Capon, G.; Capussela, T.; Ceradini, Filippo; Chi, S.; Chiefari, G.; Ciambrone, P.; Crucianelli, F.; De Lucia, E.; De Santis, A.; De Simone, P.; De Zorzi, G.; Denig, A.; Di Domenico, A.; Di Donato, C.; Di Micco, Biagio; Doria, A.; Dreucci, M.; Felici, G.; Ferrari, A.; Ferrer, M. L.; Fiore, S.; Forti, C.; Franzini, P.; Gatti, C.; Gauzzi, P.; Giovannella, S.; Gorini, E.; Graziani, E.; Kluge, W.; Kulikov, V.; Lacava, F.; Lanfranchi, G.; Lee-Franzini, J.; Leone, D.; Martini, M.; Massarotti, P.; Mei, W.; Meola, S.; Miscetti, S.; Moulson, M.; Mueller, S.; Murtas, F.; Napolitano, M.; Nguyen, Federico; Palutan, M.; Pasqualucci, E.; Passeri, Antonio; Patera, V.; Perfetto, F.; Primavera, M.; Santangelo, P.; Saracino, G.; Sciascia, B.; Sciubba, A.; Sibidanov, A.; Spadaro, T.; Testa, M.; Tortora, Ludovico; Valente, P.; Venanzoni, G.; Versaci, R.; Xu, G. 2009-01-01 Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment 598 239-243 The KLOE experiment uses a fine sampling lead-scintillating fibrecalorimeter to measure energy, time and position of neutral and charged particles. The overall detector consists of 88 modules organised in a barrel and two end-caps, for a total granularity of 2440 cells, read-out by photo-multipliers at both fibre ends. The chosen design of a high sampling fraction with the usage of thin lead layers and fast scintillating fibres allows to reach good efficiency for photonenergies down to few MeV, good energy resolution and excellent time resolution. The design, calibration and performances of the calorimeter on efficiency, time/position/energy resolution and particle identification is reviewed. The overall calorimeter impact on kaon tagging and on physics results is also presented.

Measurement of the branching ratio and search for a CP violating asymmetry in the η→π+π−e+e− (γ ) decay at KLOE

Sun, 17 May 2009 22:00:00 GMT

Measurement of the branching ratio and search for a CP violating asymmetry in the η→π+π−e+e− (γ ) decay at KLOE Ambrosino, F.; Antonelli, A.; Antonelli, M.; Archilli, F.; Beltrame, P.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocchetta, Simona; Bossi, F.; Branchini, Paolo; Capon, G.; Capussela, T.; Ceradini, Filippo; Ciambrone, P.; Crucianelli, F.; De Lucia, E.; De Santis, A.; De Simone, P.; De Zorzi, G.; Denig, A.; Di Domenico, A.; Di Donato, C.; Di Micco, Biagio; Dreucci, M.; Felici, G.; Fiore, S.; Franzini, P.; Gatti, C.; Gauzzi, P.; Giovannella, S.; Graziani, Enrico; Lanfranchi, G.; Lee-Franzini, J.; Leone, D.; Martini, M.; Massarotti, P.; Meola, S.; Miscetti, S.; Moulson, M.; Mueller, S.; Murtas, F.; Napolitano, M.; Nguyen, Federico; Palutan, M.; Pasqualucci, E.; Passeri, Antonio; Patera, V.; Perfetto, F.; Santangelo, P.; Sciascia, B.; Spadaro, T.; Testa, M.; Tortora, Ludovico; Valente, P.; Venanzoni, G.; Versaci, R.; Xu, G. 2009-05-18 Physics Letters B 675 283-288 We have studied the η→π+π−e+e− (γ ) decay using about 1.7 fb−1 collected by the KLOE experiment at the DA NE φ-factory. This corresponds to about 72 millions η mesons produced in φ radiative decays. We have measured the branching ratio, inclusive of radiative effects, with 4% accuracy: BR(η→ π+π−e+e− (γ )) = (26.8 ± 0.9Stat. ± 0.7Syst.) × 10−5. We have obtained the first measurement of the CPodd ππ–ee decay planes angular asymmetry, Aφ = (−0.6±2.5Stat. ±1.8Syst.)×10−2.

Study of the ATLAS MDT spectrometer using high energy CERN combined test beam data

Sat, 10 Jan 2009 23:00:00 GMT

Study of the ATLAS MDT spectrometer using high energy CERN combined test beam data Adorisio, C.; Aielli, G.; Alexopoulos, Th.; Alviggi, M.; Amelung, C.; Anastopoulos, Ch.; Avolio, G.; Avramidou, R.; Bachas, K.; Bagnaia, P.; Ball, R.; Barisonzi, M.; Baroncelli, Antonio; Barone, M.; Bauer, F.; Bellomo, M.; Benhammou, Y.; Bensinger, J.; Beretta, M.; Bianchi, Riccardo Maria; Bianco, M.; Bini, C.; Bobbink, G.; Borisov, A.; Boterenbrood, H.; Boyko, I.; Branchini, Paolo; Brambilla, E.; Brandenburg, G.; Bratzler, U.; Bressler, S.; Brouwer, G.; Cambiaghi, M.; Canale, V.; Caprio, M.; Cardarelli, R.; Cerutti, F.; Chapman, J. W.; Chelkov, G.; Chevalier, L.; Chiodini, G.; Cirilli, M.; Coco, R.; Curatolo, M.; Dai, T.; De Asmundis, R.; Dedovich, D.; Della Pietra, M.; Della Volpe, D.; DeZorzi, G.; Di Ciaccio, A.; DiDomenico, A.; Di Luise, Silvestro; Di Simone, A.; Dris, M.; Dushkin, A.; Ernwein, J.; Esposito, B.; Etzion, E.; Fakhrutdinov, R.; Falciano, S.; Fassouliotis, D.; Ferrari, R.; Formica, A.; Fukunaga, C.; Gaudio, G.; Gazis, Ev.; Giraud, P. -F.; Gorini, E.; Grancagnolo, F.; Gregory, J. A.; Groenstege, H.; Guimaraes da Costa, J.; Guyot, C.; Harel, A.; Hart, R.; Hashemi, K.; Hassani, S.; Herten, G.; Horvat, S.; Hurst, P.; Ichimiya, R.; Lengo, P.; Ikeno, M.; Ioannou, P.; Iodice, Mauro; Ishino, M.; Iwasaki, H.; Kataoka, Y.; Khodinov, A.; Konig, A.; Kortner, O.; Kotov, S.; Kourkoumelis, C.; Kozhin, A.; Krepouri, A.; Kroha, H.; Krumshteyn, Z.; Kurashige, H.; Landgraf, U.; Lacava, F.; Lancon, E.; Lanza, A.; Laporte, J. -F.; Lellouch, D.; Levin, D. S.; Levinson, L.; Liberti, B.; Lifshitz, R.; Linde, F.; Luci, C.; Lupu, N.; Maccarrone, G.; Maeno, T.; Mair, K.; Maltezos, S.; Manz, A.; Marchesotti, M.; Meoni, E.; Mikenberg, G.; Mohr, W.; Mohrdieck-Moeck, S.; Nagano, K.; Nicolaidou, R.; Nikolaev, K.; Nikolopoulos, K.; Nisati, A.; Nomoto, H.; Oliver, J.; Orestano, Domizia; Osborne, L. S.; Ouraou, A.; Palestini, S.; Pasqualucci, E.; Passeri, Antonio; Pastore, F.; Patricelli, S.; Perrino, R.; Petridou, Ch.; Petrucci, Fabrizio; Podkladkin, S.; Policicchio, A.; Pomarede, D.; Ponsot, P.; Pontecorvo, L.; Primavera, M.; Rebuzzi, D.; Richter, R.; Rimoldi, A.; Rosati, S.; Rothberg, J.; Sakamoto, H.; Salvatore, D.; Sampsonidis, D.; Santonico, R.; Sasaki, O.; Schricker, A.; Schuh, S.; Schune, P.; Shoa, M.; Skvorodnev, N.; Sliwa, K.; Solfaroli Camillocci, E.; Spagnolo, S.; Spogli, Luca; Strauss, E.; Sugaya, Y.; Tanaka, S.; Tarem, S.; Taylor, F. E.; Todorova, S.; Trigger, I.; Tsiafis, I.; Tsipolitis, G.; Valderanis, Ch.; Valente, P.; Vandelli, W.; van der Graaf, H.; Vari, R.; Veneziano, S.; Ventura, A.; Ventura, S.; Vermeulen, J.; Vlachos, S.; Vreeswijk, M.; Yasu, Y.; Wellenstein, H.; Werneke, P.; Wijnen, T.; Wolter, M.; Wotschack, J.; Woudstra, M.; Zema, F.; Zhao, Z.; Zhemchugov, A.; Zhou, B.; Zimmerman, S. 2009-01-11 Nuclear Instruments & Methods in Physics Research. Section A 598 400-415 In 2004, a combined system test was performed in the H8 beam line at the CERN SPS with a setup reproducing the geometry of sectors of the ATLAS Muon Spectrometer, formed by three stations of Monitored DriftTubes (MDT). The full ATLAS analysis chain was used to obtain the results presented in this paper. The basic design performances of the Muon Spectrometer were verified. The stability of MDT calibration constants, the alignment system using optical devices and high energy tracks, as well as the intrinsic sagitta resolution of the Muon Spectrometer were studied and found to agree with expectations. The reconstruction of muon tracks using the combined information from both the Inner Detector and the Muon Spectrometer are also presented.

A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson

Thu, 30 Jul 2009 22:00:00 GMT

A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson Ambrosino, F.; Antonelli, A.; Antonelli, M.; Archilli, F.; Beltrame, P.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocchetta, Simona; Bossi, F.; Branchini, Paolo; Capon, G.; Capussela, T.; Ceradini, Filippo; Ciambrone, P.; De Lucia, E.; De Santis, A.; De Simone, P.; De Zorzi, G.; Denig, A.; Di Domenico, A.; Di Donato, C.; Di Micco, Biagio; Dreucci, M.; Felici, G.; Fiore, S.; Franzini, P.; Gatti, C.; Gauzzi, P.; Giovannella, S.; Graziani, Enrico; Jacewicz, M.; Lanfranchi, G.; Lee-Franzini, J.; Martini, M.; Massarotti, P.; Meola, S.; Miscetti, S.; Moulson, M.; Mueller, S.; Murtas, F.; Napolitano, M.; Nguyen, Federico; Palutan, M.; Pasqualucci, E.; Passeri, Antonio; Patera, V.; Santangelo, P.; Sciascia, B.; Spadaro, T.; Testa, M.; Tortora, Ludovico; Valente, P.; Venanzoni, G.; Versaci, R.; Xu, G. 2009-07-31 Journal of High Energy Physics 7 105 We update the values of the eta-eta' mixing angle and of the eta' gluonium content by fitting our measurement R-phi = BR(phi -> etagamma)/BR(phi -> eta gamma) together with several vector meson radiative decays to pseudoscalars (V -> P gamma), pseudoscalar mesons radiative decays to vectors (P -> V gamma) and the eta' -> gamma gamma,pi(0) -> gamma gamma widths. From the fit we extract a gluonium fraction of Z(G)(2) = 0.12 +/- 0.04, the pseudoscalar mixing angle psi(P) = (40.4 +/- 0.6) degrees and the phi - omega mixing angle psi(V)= (3.32 +/- 0.09)degrees. Z(G)(2) and psi(P) are fairly consistent with those previously published. We also evaluate the impact on the eta' gluonium content determination of future experimental improvements of the eta' branching ratios and decay width.