73 results on '"M. Panareo"'
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2. Search for Multi-Coincidence Cosmic Ray Events over Large Distances with the EEE MRPC Telescopes
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M. Garbini, M. Battaglieri, Luca Baldini, Antonino Zichichi, Marcello Abbrescia, M. Rizzi, A. Corvaglia, Giuseppe Mandaglio, Salvatore De Pasquale, F. Nozzoli, Crispin Williams, Antonio Trifiro, L. Galante, C. Pinto, Marco Taiuti, E. Bossini, L. Votano, G. Maron, Francesco Riggi, Rosario Nania, G. Gemme, F. Coccetti, Paola La Rocca, M. Schioppa, S. Pisano, Giancarlo C. Righini, A. Scribano, C. Avanzini, D. De Gruttola, Francesco Noferini, Despina Hatzifotiadou, M. Selvi, F. Carnesecchi, M. P. Panetta, A. Mulliri, S. Grazzi, O. Pinazza, R. Zuyeuski, G. Serri, Riccardo Paoletti, G. Terreni, F. Fabbri, Eugenio Scapparone, G. Batignani, C. Ripoli, F. Palmonari, C. Vistoli, Luisa Cifarelli, M. Trimarchi, Corrado Cicalo, M. Panareo, S. Boi, E. Coccia, C. Pellegrino, Rinaldo Baldini Ferroli, Sandro Squarcia, Gabriella Sartorelli, I. Gnesi, M. N. Mazziotta, Zhang Liu, Abbrescia, Marcello, Avanzini, Carlo, Baldini, Luca, Baldini Ferroli, Rinaldo, Batignani, Giovanni, Battaglieri, Marco, Boi, Stefano, Bossini, Edoardo, Carnesecchi, Francesca, Cicalò, Corrado, Cifarelli, Luisa, Coccetti, Fabrizio, Coccia, Eugenio, Corvaglia, Alessandro, De Gruttola, Daniele, De Pasquale, Salvatore, Fabbri, Franco, Galante, Lorenzo, Garbini, Marco, Gemme, Gianluca, Gnesi, Ivan, Grazzi, Stefano, Hatzifotiadou, Despina, La Rocca, Paola, Liu, Zhang, Mandaglio, Giuseppe, Maron, Gaetano, Mazziotta, Mario Nicola, Mulliri, Alice, Nania, Rosario, Noferini, Francesco, Nozzoli, Francesco, Palmonari, Federico, Panareo, Marco, Panetta, Maria Paola, Paoletti, Riccardo, Pellegrino, Carmelo, Pinazza, Ombretta, Pinto, Chiara, Pisano, Silvia, Riggi, Francesco, Righini, Giancarlo, Ripoli, Cristina, Rizzi, Matteo, Sartorelli, Gabriella, Scapparone, Eugenio, Schioppa, Marco, Scribano, Angelo, Selvi, Marco, Serri, Gabriella, Squarcia, Sandro, Taiuti, Marco, Terreni, Giuseppe, Trifirò, Antonio, Trimarchi, Marina, Vistoli, Cristina, Votano, Lucia, Williams, Crispin, Zichichi, Antonino, and Zuyeuski, Roman
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Physics ,cosmic rays ,dust grains ,extensive air showers ,EEE experiment ,multi-coincidence events ,Astrophysics::High Energy Astrophysical Phenomena ,Science ,Observation period ,Detector ,Astronomy ,Cosmic ray ,extensive air shower ,Coincidence ,Coincident ,Time windows ,cosmic ray ,dust grain - Abstract
The existence of independent, yet time correlated, Extensive Air Showers (EAS) has been discussed over the past years, with emphasis on possible physical mechanisms that could justify their observation. The detector network of the Extreme Energy Events (EEE) Collaboration, with its approximately 60 cosmic ray telescopes deployed over the Italian territory, has the potential to search for such events, employing different analysis strategies. In this paper, we have analyzed a set of EEE data, corresponding to an approximately five month observation period, searching for multi-coincidence events among several far telescopes, within a time window of 1 ms. Events with up to 12 coincident telescopes have been observed. Results were compared to expectations from a random distribution of events and discussed with reference to the relativistic dust grain hypothesis.
- Published
- 2021
3. The Cylindrical Drift Chamber of the MEG II experiment
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M. Chiappini, A.M. Baldini, H. Benmansour, G. Cavoto, F. Cei, G. Chiarello, A. Corvaglia, F. Cuna, G. Dal Maso, M. Francesconi, L. Galli, F. Grancagnolo, M. Grassi, M. Hildebrandt, F. Ignatov, M. Meucci, A. Miccoli, W. Molzon, D. Nicolò, A. Oya, D. Palo, M. Panareo, A. Papa, F. Raffaelli, F. Renga, P. Schwendimann, G. Signorelli, G.F. Tassielli, Y. Uchiyama, A. Venturini, B. Vitali, C. Voena, Chiappini, M., Baldini, A. M., Benmansour, H., Cavoto, G., Cei, F., Chiarello, G., Corvaglia, A., Cuna, F., Maso, G. Dal, Francesconi, M., Galli, L., Grancagnolo, F., Grassi, M., Hildebrandt, M., Ignatov, F., Meucci, M., Miccoli, A., Molzon, W., Nicolò, D., Oya, A., Palo, D., Panareo, M., Papa, A., Raffaelli, F., Renga, F., Schwendimann, P., Signorelli, G., Tassielli, G. F., Uchiyama, Y., Venturini, A., Vitali, B., and Voena, C.
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Nuclear and High Energy Physics ,Gaseous detector, Drift chamber, Commissioning, Tracking, MEG II, Lepton flavor violation ,drift chamber ,Muon ,charged lepton flavour violation ,gas detector ,Instrumentation - Abstract
The MEG experiment at the Paul Scherrer Institut (PSI) represents the state of the art in the search for the charged Lepton Flavor Violating μ+→e+γ decay, setting the most stringent upper limit on the BR(μ+→e+γ)≤4.2×10^-13 (90% C.L.). An upgrade of MEG, MEG II, was designed, commissioned and recently started the physics data taking. Its goal is to reach a sensitivity level of . In order to 6×10^-14 reconstruct the positron momentum vector a Cylindrical Drift CHamber (CDCH) with unprecedented peculiarities was built, featuring angular and momentum resolutions at the 6.5 mrad and 100 keV/c level. The CDCH is a 2-meter long, 60 cm in diameter, low-mass, single volume detector with high granularity: 9 layers of 192 drift cells, few mm wide, defined by wires in a stereo configuration for longitudinal hit localization. The filling gas mixture is Helium:Isobutane 90:10. The total radiation length is 1.5×10^-3 X0, thus minimizing the Multiple Coulomb Scattering and allowing for a single-hit resolution
- Published
- 2023
4. The Central Tracker of the CMD3 detector
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F. Cuna, G. Chiarello, A. Miccoli, A. Corvaglia, N. De Filippis, E. Gorini, F. Grancagnolo, M. Panareo, M. Primavera, G.F. Tassielli, A. Ventura, Cuna, F., Chiarello, G., Miccoli, A., Corvaglia, A., De Filippis, N., Gorini, E., Grancagnolo, F., Panareo, M., Primavera, M., Tassielli, G. F., and Ventura, A.
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Nuclear and High Energy Physics ,Gas detector Tracking ,Instrumentation - Abstract
The CMD-3 experiment has been operating at the VEPP-2000 electron–positron collider, at the Budker Institute of Nuclear Physics, since December 2010. Its main goal is to measure the hadronic cross sections necessary to evaluate the anomalous magnetic moment of the muon. The discrepancy between the theoretical calculations and the experimental results obtained at the Brookhaven experiments is approximately 3.7σ. The comparison between the results of the new “g-2” experiment at Fermilab and the theoretical calculation thanks to the new experimental contributions from CMD3 would provide important contributions to this measurement, which could prove the existence of New Physics. A key element for the success the CMD3 experiment is the tracking detector, which is a drift chamber built in the year 2009 at INFN of Lecce. Because of aging effects, its replacement is necessary. This paper presents the innovative design for the new ultralight CMD3 drift chamber.
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- 2023
5. A 10−3 drift velocity monitoring chamber for the MEG II experiment
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F. Cuna, G. Chiarello, A. Miccoli, A. Corvaglia, N. De Filippis, E. Gorini, F. Grancagnolo, M. Panareo, M. Primavera, G.F. Tassielli, and A. Ventura
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Nuclear and High Energy Physics ,Instrumentation - Published
- 2023
6. The central tracker of SCTF and CMD3 detectors
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F. Cuna, G. Chiarello, A. Miccoli, A. Corvaglia, N. De Filippis, E. Gorini, F. Grancagnolo, M. Panareo, M. Primavera, G.F. Tassielli, A. Ventura, Cuna, F., Chiarello, G., Miccoli, A., Corvaglia, A., De Filippis, N., Gorini, E., Grancagnolo, F., Panareo, M., Primavera, M., Tassielli, G. F., and Ventura, A.
- Subjects
Nuclear and High Energy Physics ,Instrumentation ,Gas detector, Tracking - Abstract
The CMD3 experiment has been operating at the VEPP-2000 electron-positron collider, at the Budker Institute of Nuclear Physics, since December 2010. Its main goal is to measure the hadronic cross sections necessary to evaluate the anomalous magnetic moment of the muon. The discrepancy between the theoretical calculations and the experimental results obtained at the Brookhaven experiments is approximately 3.7sigma. The comparison between the results of the new “g-2” experiment at Fermilab and the theoretical calculation with the new experimental contributions from CMD3 could confirm the discrepancy, which is a new important hint of New Physics. A key element for the success the CMD3 experiment is the tracking detector, which is a drift chamber built in the year 2009 at INFN of Lecce. Due to aging effects, its replacement is necessary, so that an innovative tracking detector, named TraPId (Tracking and Particle Identification), has been designed: an ultra-light drift chamber equipped with cluster counting/timing readout techniques, which exploits the expertise gained with the successful construction of the MEG II drift chamber. The drift chamber proposed for CMD3 will be also the prototype for the tracking system of the future Super Charm-Tau Factory detector (SCTF). In this paper, the new design of TraPId is described, with a focus on the mechanical design of the end plates, their novel tension recovery scheme and the expected performances.
- Published
- 2022
7. Looking for long-range correlations among the EEE telescopes
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A. Scribano, Salvatore De Pasquale, M. Taiuti, G. Serri, Luisa Cifarelli, C. Pinto, Francesco Noferini, G. Gemme, E. Bossini, M. Garbini, Despina Hatzifotiadou, M. Battaglieri, M. Schioppa, C. Ripoli, E. Coccia, M. P. Panetta, F. Fabbri, F. Coccetti, L. Galante, S. Pisano, C. Vistoli, S. Grazzi, M. N. Mazziotta, Giancarlo C. Righini, C. Pellegrino, Zheng Liu, Rosario Nania, A. Mulliri, O. Pinazza, C. Avanzini, Sandro Squarcia, Riccardo Paoletti, M. Panareo, M. Selvi, F. Carnesecchi, G. Terreni, Corrado Cicalo, Antonino Zichichi, G. Batignani, F. Palmonari, Gabriella Sartorelli, I. Gnesi, Luca Baldini, Marcello Abbrescia, M. Rizzi, Rinaldo Baldini Ferroli, Giuseppe Mandaglio, P. La Rocca, F. Nozzoli, D. De Gruttola, M. Trimarchi, S. Boi, A. Corvaglia, L. Votano, Eugenio Scapparone, Crispin Williams, Antonio Trifiro, G. Maron, Francesco Riggi, R. Zuyeuski, La Rocca, P., Abbrescia, Marcello, Avanzini, Carlo, Baldini, Luca, Baldini Ferroli, Rinaldo, Batignani, Giovanni, Battaglieri, Marco, Boi, Stefano, Bossini, Edoardo, Carnesecchi, Francesca, Cicalo, Corrado, Cifarelli, Luisa, Coccetti, Fabrizio, Coccia, Eugenio, Corvaglia, Alessandro, De Gruttola, Daniele, De Pasquale, Salvatore, Fabbri, Franco L., Galante, Lorenzo, Garbini, Marco, Gemme, Gianluca, Gnesi, Ivan, Grazzi, Stefano, Hatzifotiadou, Despina, Liu, Zheng, Mandaglio, Giuseppe, Maron, Gaetano, Mazziotta, Mario Nicola, Mulliri, Alice, Nania, Rosario, Noferini, Francesco, Nozzoli, Francesco, Palmonari, Federico, Panareo, Marco, Panetta, Maria Paola, Paoletti, Riccardo, Pellegrino, Carmelo, Pinazza, Ombretta, Pinto, Chiara, Pisano, Silvia, Riggi, Francesco, Righini, Giancarlo Cesare, Ripoli, Cristina, Rizzi, Matteo, Sartorelli, Gabriella, Scapparone, Eugenio, Schioppa, Marco, Scribano, Angelo, Selvi, Marco, Serri, Gabriella, Squarcia, Sandro, Taiuti, Mauro, Terreni, Giuseppe, Trifirò, Antonio, Trimarchi, Marina, Vistoli, Cristina, Votano, Lucia, Williams, Crispin, Zichichi, Antonino, and Zuyeuski, Roman
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Astrophysics and Astronomy ,COSMIC cancer database ,Wide area ,Photodisintegration ,Extreme Energy Events ,Detector ,Solar field ,Range (statistics) ,Astronomy ,Environmental science ,Cosmic muons ,Tracking (particle physics) - Abstract
The search for long-range correlations among air showers is one of the main goal of the Extreme Energy Events (EEE) Project. The existence of such events has only been supposed theoretically through several physical mechanisms, the most convincing being the so-called GZ effect, based on the photodisintegration of a heavy primary nucleus in the solar field. Even with a large detector coverage, current rate expectations are of few events per year. To measure time correlations among distant air showers, sparse arrays of detection stations spread over large areas are needed. A very limited number of experimental setups can perform this measurement and few experimental results have been reported over the past years. Started in 2004 the EEE project is a network of about 60 cosmic muons tracking telescopes made by 3 wide area Multigap Resistive Plate Chambers (MRPCs), sensitive to the direction of incident charged cosmic particles. The telescopes are distributed over the whole Italian territory, thus making the EEE array an ideal tool for the detection of long-range time correlations among extensive air showers. In this paper we will describe the analysis strategies adopted to search for such rare correlation events, together with the results obtained analysing the full statistics collected by the EEE telescopes.
- Published
- 2021
8. The cosmic muon and detector simulation framework of the Extreme Energy Events (EEE) experiment
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Rosario Nania, P. La Rocca, C. Avanzini, A. Fulci, M. Selvi, C. Ripoli, F. Carnesecchi, E. Coccia, Despina Hatzifotiadou, A.S. Triolo, C. Pinto, G. Batignani, F. Coccetti, L. Galante, Francesco Noferini, M. Garbini, R. Zuyeuski, M. Taiuti, M. Panareo, Marco Schioppa, A. Mulliri, M. Battaglieri, M. Ungaro, M. P. Panetta, A. Corvaglia, G. Serri, Francesco Riggi, S. Squarcia, F. Palmonari, S. Grazzi, E. Bossini, G. Sartorelli, C. Vistoli, Z. Liu, C. Pellegrino, L. Cifarelli, S. De Pasquale, I. Gnesi, G. Gemme, O. Pinazza, Giuseppe Mandaglio, F. Nozzoli, L. Votano, F. L. Fabbri, Luca Baldini, Marcello Abbrescia, Mn Mazziotta, M. Rizzi, Giancarlo C. Righini, E. Scapparone, M. C. S. Williams, Antonio Trifiro, G. Maron, Antonino Zichichi, R. Baldini Ferroli, C. Cicalò, D. De Gruttola, A. Scribano, Riccardo Paoletti, G. Terreni, S. Pisano, M. Trimarchi, S. Boi, Abbrescia, M., Avanzini, C., Baldini, L., Ferroli, R. Baldini, Batignani, G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Cicalò, C., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., De Gruttola, D., De Pasquale, S., Fabbri, F., Fulci, A., Galante, L., Garbini, M., Gemme, G., Gnesi, I., Grazzi, S., Hatzifotiadou, D., Rocca, P. La, Liu, Z., Mandaglio, G., Maron, G., Mazziotta, M. N., Mulliri, A., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Pellegrino, C., Pinazza, O., Pinto, C., Pisano, S., Riggi, F., Righini, G., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Serri, G., Squarcia, S, Taiuti, M., Terreni, G., Trifirò, A., Trimarchi, M., Triolo, A. S., Vistoli, C., Votano, L., Ungaro, M., Williams, M. C. S., Zichichi, A., and Zuyeuski, R.
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Physics ,Physics - Instrumentation and Detectors ,Muon ,COSMIC cancer database ,Physics and Astronomy (miscellaneous) ,Physics::Instrumentation and Detectors ,Detector ,Flux ,FOS: Physical sciences ,QC770-798 ,Instrumentation and Detectors (physics.ins-det) ,Astrophysics ,law.invention ,QB460-466 ,Nuclear physics ,Telescope ,law ,Nuclear and particle physics. Atomic energy. Radioactivity ,Detectors and Experimental Techniques ,physics.ins-det ,Engineering (miscellaneous) ,Parametrization ,Image resolution ,Cosmic rays, cosmic muons, MRPC, extreme energy events, GEANT4 ,Energy (signal processing) - Abstract
This paper describes the simulation framework of the Extreme Energy Events (EEE) experiment. EEE is a network of cosmic muon trackers, each made of three Multi-gap Resistive Plate Chambers (MRPC), able to precisely measure the absolute muon crossing time and the muon integrated angular flux at the ground level. The response of a single MRPC and the combination of three chambers have been implemented in a GEANT4-based framework (GEMC) to study the telescope response. The detector geometry, as well as details about the surrounding materials and the location of the telescopes have been included in the simulations in order to realistically reproduce the experimental set-up of each telescope. A model based on the latest parametrization of the cosmic muon flux has been used to generate single muon events. After validating the framework by comparing simulations to selected EEE telescope data, it has been used to determine detector parameters not accessible by analysing experimental data only, such as detection efficiency, angular and spatial resolution., Comment: 16 pages, 25 figures, 3 tables, submitted to EPJC
- Published
- 2021
- Full Text
- View/download PDF
9. Extensive Cosmic Showers Detection: Metrological Characterization and Optimization of the EEE Timing System
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M. Taiuti, G. Serri, Marco Schioppa, D. Hatzifotiadou, M. Panareo, M. Garbini, G. Piragino, S. Pisano, D. Calonico, A. Mulliri, S. Squarcia, Francesco Noferini, L. G. Batignani, M. C. Vistoli, Antonino Zichichi, Rosario Nania, M. Battaglieri, R. Baldini Ferroli, D. De Gruttola, G. Gemme, S. Grazzi, C. Pellegrino, G. Sartorelli, C. Avanzini, M. Selvi, C. Cicalò, P. La Rocca, G. Terreni, F. Coccetti, I. Gnesi, M. P. Panetta, C. Ripoli, E. Bossini, L. Fabbri, Z. Liu, L. Votano, Giancarlo Cerretto, E. Scapparone, M. Trimarchi, M. C. S. Williams, R. Paoletti, P. Galeotti, Antonio Trifiro, G. Maron, S. Boi, C. Pinto, Giuseppe Mandaglio, Filippo Levi, F. Carnesecchi, E. Coccia, F. Nozzoli, L. Perasso, Luca Baldini, Marcello Abbrescia, Mn Mazziotta, M. Rizzi, Marco Sellone, E. Cantoni, L. Galante, Giancarlo C. Righini, F. Palmonari, A. Corvaglia, L. Cifarelli, S. De Pasquale, Francesco Riggi, Alberto Mura, R. Zuyeuski, and A. Scribano
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COSMIC cancer database ,Timing system ,Environmental science ,Metrology ,Characterization (materials science) ,Remote sensing - Published
- 2020
10. A 10-3 drift velocity monitoring chamber
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M. Manta, G. F. Tassielli, A. Miccoli, A. Corvaglia, F. Grancagnolo, G. Chiarello, I. Margjeka, F. Cuna, M. Panareo, N. De Filippis, Cuna, F., Chiarello, G., Corvaglia, A., Filippis, N. De, Grancagnolo, F., Manta, M., Margjeka, I., Miccoli, A., Panareo, M., and Tassielli, G. F.
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Physics - Instrumentation and Detectors ,Materials science ,Drift velocity ,business.industry ,Physics::Instrumentation and Detectors ,Particle tracking detectors (Gaseous detectors) ,Detector ,FOS: Physical sciences ,Sense (electronics) ,Electron ,Instrumentation and Detectors (physics.ins-det) ,Scintillator ,Cathode ,High Energy Physics - Experiment ,law.invention ,Detector modelling and simulations (interaction of radiation with matter, interactionof photons with matter, interaction of hadrons with matter, etc) ,High Energy Physics - Experiment (hep-ex) ,Optics ,law ,Electric field ,Calibration ,Gaseous detector ,business ,Instrumentation ,Mathematical Physics - Abstract
The MEG-II experiment searches for the lepton flavor violating decay: mu in electron and gamma. The reconstruction of the positron trajectory uses a cylindrical drift chamber operated with a mixture of He and iC4H10 gas. It is important to provide a stable performance of the detector in terms of its electron transport parameters, avalanche multiplication, composition and purity of the gas mixture. In order to have a continuous monitoring of the quality of gas, we plan to install a small drift chamber, with a simple geometry that allows to measure very precisely the electron drift velocity in a prompt way. This monitoring chamber will be supplied with gas coming from the inlet and the outlet of the detector to determine if gas contaminations originate inside the main chamber or in the gas supply system. The chamber is a small box with cathode walls, that define a highly uniform electric field inside two adjacent drift cells. Along the axis separating the two drift cells, four staggered sense wires alternated with five guard wires collect the drifting electrons. The trigger is provided by two 90Sr weak calibration radioactive sources placed on top of a two thin scintillator tiles telescope. The whole system is designed to give a prompt response (within a minute) about drift velocity variations at the 0.001 level.
- Published
- 2020
- Full Text
- View/download PDF
11. A high performance Front End Electronics for drift chamber readout in MEG experiment upgrade
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A. Corvaglia, G. F. Tassielli, A. Pepino, M. Panareo, G. Chiarello, C. Pinto, C. Chiri, F. Grancagnolo, Chiarello, Gianluigi, Chiri, Claudio, Corvaglia, A., Grancagnolo, F., Panareo, Marco, Pepino, Aurora, Pinto, Carlo, and Tassielli, GIOVANNI FRANCESCO
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Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,business.industry ,Bandwidth (signal processing) ,Electrical engineering ,Time resolution ,01 natural sciences ,Front end electronics ,Front and back ends ,Upgrade ,Ionization ,0103 physical sciences ,Electronics ,MEG experiment, Drift chamber, Front End Electronics, Wide bandwidth, Cluster timing, Spatial resolution ,010306 general physics ,business ,Instrumentation ,Image resolution - Abstract
Front End (FE) Electronics plays an essential role in Drift Chambers (DC) for time resolution and, therefore, spatial resolution. The use of cluster timing techniques, by measuring the timing of all the individual ionization clusters after the first one, may enable to reach resolutions even below 100 μm in the measurement of the impact parameter. To this purpose, a Front End Electronics with a wide bandwidth and low noise is mandatory in order to acquire and amplify the drift chamber signals.
- Published
- 2016
12. Nanomechanical and electrical properties of Nb thin films deposited on Pb substrates by pulsed laser deposition as a new concept photocathode for superconductor cavities
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Giuseppe Maruccio, Antonella Lorusso, M. Panareo, Esteban Broitman, Alessio Perrone, Anna Grazia Monteduro, F. Gontad, GONTAD FARIÑA, FRANCISCO JOSÉ, Lorusso, Antonella, Panareo, Marco, Monteduro, ANNA GRAZIA, Maruccio, Giuseppe, Broitman, E, and Perrone, Alessio
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Physics ,Superconductivity ,Oorganisk kemi ,Nuclear and High Energy Physics ,business.industry ,Nb thin film Pulsed laser deposition Metallic photocathodes Superconductive radiofrequency cavit ,Niobium ,chemistry.chemical_element ,Nanoindentation ,Photocathode ,Pulsed laser deposition ,Inorganic Chemistry ,chemistry ,Electrical resistivity and conductivity ,Optoelectronics ,Thin film ,business ,Instrumentation ,Deposition (law) - Abstract
We report a design of photocathode, which combines the good photoemissive properties of lead (Pb) and the advantages of superconducting performance of niobium (Nb) when installed into a superconducting radio-frequency gun. The new configuration is obtained by a coating of Nb thin film grown on a disk of Pb via pulsed laser deposition. The central emitting area of Pb is masked by a shield to avoid the Nb deposition. The nanomechanical properties of the Nb film, obtained through nanoindentation measurements, reveal a hardness of 2.8±0.3 GPa, while the study of the electrical resistivity of the film shows the appearance of the superconducting transitions at 9.3 K and 7.3 K for Nb and Pb, respectively, very close to the bulk material values. Additionally, morphological, structural and contamination studies of Nb thin film expose a very low droplet density on the substrate surface, a small polycrystalline orientation of the films and a low contamination level. These results, together with the acceptable Pb quantum efficiency of 2×10−5 found at 266 nm, demonstrate the potentiality of the new concept photocathode. Funding agencies: Italian National Institute of Nuclear Physics (INFN); Italian MIUR through the Project FIRB Futuro in Ricerca [RBFR12NK5K]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]
- Published
- 2015
13. The front end electronics for the drift chamber readout in MEG experiment upgrade
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A. Corvaglia, G. Tassielli, M. Chiappini, M. Meucci, Luca Galli, M. Francesconi, G. Chiarello, F. Grancagnolo, M. Panareo, Panareo, M., Chiappini, M., Chiarello, G., Corvaglia, A., Francesconi, M., Galli, L., Grancagnolo, F., Meucci, M., and Tassielli, G. F.
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Physics ,business.industry ,Particle tracking detectors (Gaseous detectors) ,Analogue electronic circuits ,Front-end electronics for detector readout ,Wire chambers (MWPC, Thin-gap chambers, drift chambers, drift tubes, proportional chambers etc) ,Time resolution ,Front end electronics ,Particle detector ,Analogue electronic circuit ,Noise ,Upgrade ,Optics ,Measuring instrument ,business ,Instrumentation ,Mathematical Physics - Abstract
Front-end electronics plays an essential role in drift chambers for time resolution and, therefore, spatial resolution. The use of cluster timing techniques, by measuring the arriving times of all the individual ionization clusters after the first one, may enable to reach resolutions even below 100 μm in the measurement of the impact parameter. A high performance front-end electronics, characterized by low distortion, low noise and a wide bandwidth has been developed with the purpose to implement cluster timing techniques in the new drift chamber for the upgrade of the MEG experiment at Paul Sherrer Institut (CH)
- Published
- 2020
14. Commissioning of the MEG II tracker system
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A. Corvaglia, F. Raffaelli, G. Signorelli, Marco Francesconi, A. M. Baldini, M. Chiappini, G. F. Tassielli, Marco Grassi, F. Grancagnolo, A. Papa, C. Voena, A. Miccoli, M. Meucci, D. Nicoló, G. Chiarello, M. Hildebrandt, G. Cavoto, M. Panareo, Fabrizio Cei, L. Galli, F. Renga, P. Schwendimann, Chiappini, M., Baldini, A. M., Cavoto, G., Cei, F., Chiarello, G., Corvaglia, A., Francesconi, M., Galli, L., Grancagnolo, F., Grassi, M., Hildebrandt, M., Meucci, M., Miccoli, A., Nicolò, D., Panareo, M., Papa, A., Raffaelli, F., Renga, F., Schwendimann, P., Signorelli, G., Tassielli, G. F., and Voena, C.
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Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,Particle tracking detectors (Gaseous detectors) ,Phase (waves) ,FOS: Physical sciences ,Elementary particle ,Particle detector ,Radiation length ,High Energy Physics - Experiment ,Wire chambers (mwpc ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,drift chambers ,Gaseous detector ,Sensitivity (control systems) ,Instrumentation ,drift tubes ,Mathematical Physics ,Physics ,Elastic scattering ,Particle tracking detectors (gaseous detectors) ,Detector design and construction technologies and material ,Scattering ,Detector design and construction technologies and materials ,gaseous detectors ,Wire chambers (mwpc, thin-gap chambers, drift chambers, drift tubes, proportional chambers etc) ,Instrumentation and Detectors (physics.ins-det) ,lepton flavour violation ,drift chamber ,Wire chambers (MWPC, Thin-gap chambers, drift chambers, drift tubes, proportional chambers etc) ,thin-gap chambers ,proportional chambers etc) ,Lepton - Abstract
The MEG experiment at the Paul Scherrer Institut (PSI) represents the state of the art in the search for the charged Lepton Flavour Violating (cLFV) $\mu^+ \rightarrow e^+ \gamma$ decay. With the phase 1, MEG set the new world best upper limit on the $\mbox{BR}(\mu^+ \rightarrow e^+ \gamma) < 4.2 \times 10^{-13}$ (90% C.L.). With the phase 2, MEG II, the experiment aims at reaching a sensitivity enhancement of about one order of magnitude compared to the previous MEG result. The new Cylindrical Drift CHamber (CDCH) is a key detector for MEG II. CDCH is a low-mass single volume detector with high granularity: 9 layers of 192 drift cells, few mm wide, defined by $\sim 12000$ wires in a stereo configuration for longitudinal hit localization. The filling gas mixture is Helium:Isobutane (90:10). The total radiation length is $1.5 \times 10^{-3}$ $\mbox{X}_0$, thus minimizing the Multiple Coulomb Scattering (MCS) contribution and allowing for a single-hit resolution $< 120$ $\mu$m and an angular and momentum resolutions of 6 mrad and 90 keV/c respectively. This article presents the CDCH commissioning activities at PSI after the wiring phase at INFN Lecce and the assembly phase at INFN Pisa. The endcaps preparation, HV tests and conditioning of the chamber are described, aiming at reaching the final stable working point. The integration into the MEG II experimental apparatus is described, in view of the first data taking with cosmic rays and $\mu^+$ beam during the 2018 and 2019 engineering runs. The first gas gain results are also shown. A full engineering run with all the upgraded detectors and the complete DAQ electronics is expected to start in 2020, followed by three years of physics data taking., Comment: 10 pages, 12 figures, 1 table, proceeding at INSTR'20 conference, accepted for publication in JINST
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- 2020
15. Test of new eco-gas mixtures for the multigap resistive plate chambers of the EEE project
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M. Panareo, F. L. Fabbri, M. Taiuti, A. Scribano, M. C. Vistoli, G. Gemme, Marco Schioppa, Francesco Noferini, W. Park, L. G. Batignani, S. Grazzi, Despina Hatzifotiadou, C. Gustavino, S. Miozzi, G. Sartorelli, Fabrizio Giulio Luca Pilo, Luca Baldini, S. Squarcia, Riccardo Paoletti, G. Terreni, G. Piragino, S. Pisano, M. Garbini, Marcello Abbrescia, E. Scapparone, D. De Gruttola, M. P. Panetta, M. C. S. Williams, M. Rizzi, F. Coccetti, M. Battaglieri, S. Serci, Francesco Riggi, L. Perasso, M. N. Mazziotta, G. Maron, M. Trimarchi, Giuseppe Mandaglio, F. Carnesecchi, E. Coccia, O. Maragoto Rodriguez, S. Boi, Antonino Zichichi, R. Baldini Ferroli, F. Nozzoli, A. Trifirò, C. Ripoli, E. Bossini, F. Palmonari, L. Votano, C. Pellegrino, A. Corvaglia, R. Zuyeuski, C. Cicalò, P. Galeotti, P. La Rocca, Rosario Nania, L. Galante, C. Avanzini, M. Selvi, A. Chiavassa, Giancarlo C. Righini, I. Gnesi, L. Zheng, Vladimir Frolov, L. Cifarelli, S. De Pasquale, Trimarchi M., Abbrescia M., Avanzini C., Baldini L., Ferroli R.B., Batignani L.G., Battaglieri M., Boi S., Bossini E., Carnesecchi F., Chiavassa A., Cicalo C., Cifarelli L., Coccetti F., Coccia E., Corvaglia A., De Gruttola D., De Pasquale S., Fabbri F., Frolov V., Galante L., Galeotti P., Garbini M., Gemme G., Gnesi I., Grazzi S., Gustavino C., Hatzifotiadou D., Rocca P.L., Mandaglio G., Rodriguez O.M., Maron G., Mazziotta M.N., Miozzi S., Nania R., Noferini F., Nozzoli F., Palmonari F., Panareo M., Panetta M.P., Paoletti R., Park W., Pellegrino C., Perasso L., Pilo F., Piragino G., Pisano S., Riggi F., Righini G.C., Ripoli C., Rizzi M., Sartorelli G., Scapparone E., Schioppa M., Scribano A., Selvi M., Serci S., Squarcia S., Taiuti M., Terreni G., Trifiro A., Vistoli M.C., Votano L., Williams M.C.S., Zheng L., Zichichi A., Zuyeuski R., Trimarchi, M., Abbrescia, M., Avanzini, C., Baldini, L., Ferroli, R. Baldini, Batignani, L. G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Chiavassa, A., Cicalo, C., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., De Gruttola, D., De Pasquale, S., Fabbri, F., Frolov, V., Galante, L., Galeotti, P., Garbini, M., Gemme, G., Gnesi, I., Grazzi, S., Gustavino, C., Hatzifotiadou, D., Rocca, P. La, Mandaglio, G., Rodriguez, O. Maragoto, Maron, G., Mazziotta, M. N., Miozzi, S., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Park, W., Pellegrino, C., Perasso, L., Pilo, F., Piragino, G., Pisano, S., Riggi, F., Righini, G. C., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Serci, S., Squarcia, S., Taiuti, M., Terreni, G., Trifirò, A., Vistoli, M. C., Votano, L., Williams, M. C. S., Zheng, L., Zichichi, A., and Zuyeuski, R.
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Physics ,Nuclear and High Energy Physics ,Resistive touchscreen ,Muon ,Large Hadron Collider ,Cosmic ray ,Eco gas testing ,Multigap resistive plate chambers ,Instrumentation ,Sulfur hexafluoride ,Nuclear physics ,chemistry.chemical_compound ,chemistry ,Stack (abstract data type) ,Eco gas testing, Multigap resistive plate chambers, Nuclear and High Energy Physics, Instrumentation ,Multigap resistive plate chambers, Eco gas testing ,Fermi Gamma-ray Space Telescope - Abstract
The Extreme Energy Events (EEE) experiment is a project by Centro Fermi (Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”) in collaboration with INFN, CERN and MIUR, designed to study cosmic rays via a network of muon telescopes, based on the Multigap Resistive Plate Chambers (MRPC) technology. Due to its wide coverage over the Italian territory (more than 10 ° in latitude and longitude, covering more than 3 x 1 0 5 k m 2 ), the EEE network is the largest MRPC – based system for cosmic rays detection. Each MRPC has 6 gas gaps obtained by a stack of glass plate, spaced 250 μ m each, and is equipped with 24 copper strips. Since its beginning, the EEE MRPCs were filled with a gas mixture of 98% of tetrafluoroethane and 2% of sulfur hexafluoride, but recent restrictions on greenhouse gases have prompted the study of their performance with new gas mixtures. To this aim, extensive tests of tetrafluoropropene and carbon dioxide or sulfur hexafluoride gas mixtures have been carried out.
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- 2019
16. The tracking system for the IDEA detector at future lepton colliders
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M. Panareo, G. Tassielli, G. Chiarello, A. Miccoli, F. Grancagnolo, A. Corvaglia, Chiarello, G., Corvaglia, A., Grancagnolo, F., Miccoli, A., Panareo, M., and Tassielli, G. F.
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Physics ,Tracking detectors, Gas detectors, Drift chamber, FCC, CEPC ,Nuclear and High Energy Physics ,Luminosity (scattering theory) ,Large Hadron Collider ,International Linear Collider ,Physics::Instrumentation and Detectors ,010308 nuclear & particles physics ,Radius ,01 natural sciences ,Future Circular Collider ,Particle identification ,030218 nuclear medicine & medical imaging ,law.invention ,Nuclear physics ,03 medical and health sciences ,0302 clinical medicine ,law ,0103 physical sciences ,Collider ,Instrumentation ,Lepton - Abstract
While most requirements for detectors at the International Linear Collider (ILC) are very similar to those for the future circular e + e − -colliders FCC–ee ( e + e − Future Circular Collider at CERN) or CEPC (Circular Electron–Positron Collider at IHEP, China), the luminosity is expected to be one or two orders of magnitude larger, with a much shorter bunch spacing, placing severe constraints on the tracking system, favouring an intrinsically fast main tracker to fully exploit the cleanliness of the e + e − environment. Moreover, limits on the maximum magnetic field of the tracker solenoid represent a problem for a large volume TPC, because of the resolution degradation, and for a Si tracker, since it would require a larger radius. The proposed ultra-light He based Drift Chamber is 4 m long, starting at a radius of ∼ 30 c m and extending up to 2 m , with ≲ 1 . 5 c m drift cells, arranged in a fully stereo configuration ( ( 50 – 250 ) m r a d ) and instrumented with readout electronics implementing the Cluster Counting/Timing technique. The total material budget is approximately 0 . 016 X 0 for tracks in the barrel region and 0 . 05 X 0 for forward tracks, providing a momentum resolution of ∼ 5 × 1 0 − 4 for 10 G e V ∕ c and of 4 × 1 0 − 3 for 100 G e V ∕ c tracks. Moreover, the use of the Cluster Counting technique will allow for a particle identification (PID) resolution 3 % , a factor two better than the resolution attainable with dE/dx technique. We will illustrate the tracking system performance obtained with detailed simulations. The hardware features and the construction procedures of the proposed Drift Chamber, making use of the assembly technique developed for MEG2, will also be presented.
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- 2019
17. Performance of the multigap resistive plate chambers of the extreme energy events project
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Corrado Cicalo, Rosario Nania, C. Avanzini, L. Fabbri, Luca Baldini, M. Selvi, A. Chiavassa, C. Gustavino, Fabrizio Giulio Luca Pilo, M. Rizzi, M. C. S. Williams, L. Galante, Giancarlo C. Righini, F. Coccetti, A. Scribano, S. De Pasquale, G. Piragino, Antonio Trifiro, G. Maron, Giuseppe Mandaglio, S. Pisano, F. Nozzoli, S. Serci, G. Gemme, M. N. Mazziotta, M. C. Vistoli, S. Grazzi, Antonino Zichichi, Riccardo Paoletti, R. Baldini Ferroli, G. Terreni, I. Gnesi, C. Ripoli, L. Votano, A. Corvaglia, P. La Rocca, Eugenio Scapparone, D. De Gruttola, F. Carnesecchi, E. Coccia, L. Perasso, M. Panareo, W. Park, L. G. Batignani, G. Sartorelli, S. Miozzi, M. Garbini, M. Battaglieri, E. Bossini, F. Palmonari, Despina Hatzifotiadou, Luisa Cifarelli, C. Pellegrino, L. Zheng, Vladimir Frolov, M. Trimarchi, O. Maragoto Rodriguez, S. Boi, M. Taiuti, Marco Schioppa, S. Squarcia, Francesco Noferini, M. P. Panetta, P. Galeotti, M. Abbrescia, R. Zuyeuski, Francesco Riggi, Garbini, M., Abbrescia, M., Avanzini, C., Baldini, L., Baldini Ferroli, R., Batignani, L. G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Chiavassa, A., Cicalo, C., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., De Gruttola, D., De Pasquale, S., Fabbri, L., Frolov, V., Galante, L., Galeotti, P., Gemme, G., Gnesi, I., Grazzi, S., Gustavino, C., Hatzifotiadou, D., La Rocca, P., Mandaglio, G., Maragoto Rodriguez, O., Maron, G., Mazziotta, M. N., Miozzi, S., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Pellegrino, C., Park, W., Perasso, L., Pilo, F., Piragino, G., Pisano, S., Riggi, F., Righini, G. C., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Serci, S., Squarcia, S., Taiuti, M., Terreni, G., Trifirò, A., Trimarchi, M., Vistoli, M. C., Votano, L., Williams, M. C. S., Zheng, L., Zichichi, A., Zuyeuski, R., Gruttola, D. De, Ferroli, R. Baldini, Batignani, G., Pasquale, S. De, Fabbri, F. L., Rocca, P. La, and Rodriguez, O. Maragoto
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Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,Resistive plate chamber ,Performance of High Energy Physics Detector ,FOS: Physical sciences ,Cosmic ray ,Tracking (particle physics) ,Timing detectors ,01 natural sciences ,Cosmic rays, Multi gap resistive plate chambers, Tracking detectors, Nuclear and High Energy Physics, Instrumentation ,030218 nuclear medicine & medical imaging ,Tracking detectors ,03 medical and health sciences ,0302 clinical medicine ,Muon spectrometer ,Particle tracking detectors ,0103 physical sciences ,Detectors and Experimental Techniques ,Aerospace engineering ,physics.ins-det ,Cosmic rays ,Instrumentation ,Mathematical Physics ,Performance of High Energy Physics Detectors ,Resistive-plate chambers ,Physics ,Resistive touchscreen ,010308 nuclear & particles physics ,business.industry ,Tracking detectors, Cosmic rays, Multi gap resistive plate chambers ,Detector ,Time resolution ,Instrumentation and Detectors (physics.ins-det) ,Particle tracking detector ,Multi gap resistive plate chambers ,Global Positioning System ,business ,Energy (signal processing) - Abstract
The muon telescopes of the Extreme Energy Events (EEE) Project are made of three Multigap Resistive Plate Chambers (MRPC). The EEE array is composed, so far, of 59 telescopes and is organized in clusters and single telescope stations distributed all over the Italian territory. They are installed in High Schools with the aim to join research and teaching activities, by involving researchers, teachers and students in the construction, maintenance, data taking and data analysis. The unconventional working sites, mainly school buildings with non-controlled environmental parameters and heterogeneous maintenance conditions, are a unique test field for checking the robustness, the low-ageing features and the long-lasting performance of the MRPC technology for particle tracking and timing purposes. The measurements performed with the EEE array require excellent performance in terms of time and spatial resolution, efficiency, tracking capability and stability. The data from two recent coordinated data taking periods, named Run 2 and Run 3, have been used to measure these quantities and the results are described, together with a comparison with expectations and with the results from a beam test performed in 2006 at CERN., 6 pages, 4 figures, conference RPC 2018
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- 2019
18. The new drift chamber of the MEG II experiment
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Marco Grassi, G. Tassielli, G. Cavoto, F. Renga, F. Grancagnolo, G. Chiarello, C. Voena, Luca Galli, Fabrizio Cei, M. Hildebrandt, Donato Nicolo, F. Raffaelli, A. M. Baldini, Giovanni Signorelli, M. Panareo, M. Francesconi, Angela Papa, M. Chiappini, Chiappini, M., Baldini, A. M., Cavoto, G., Cei, F., Chiarello, G., Francesconi, M., Galli, L., Grancagnolo, F., Grassi, M., Hildebrandt, M., Nicolò, D., Panareo, M., Papa, A., Raffaelli, F., Renga, F., Signorelli, G., Tassielli, G. F., and Voena, C.
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Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,Phase (waves) ,FOS: Physical sciences ,01 natural sciences ,Radiation length ,High Energy Physics - Experiment ,Drift chambers ,Gas detectors ,MEG II experiment ,Tracking detectors ,Momentum ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,010306 general physics ,Instrumentation ,High rate ,Physics ,Tracking detectors, Gas detectors, Drift chambers, MEG II experiment ,010308 nuclear & particles physics ,Resolution (electron density) ,Detector ,Instrumentation and Detectors (physics.ins-det) ,High Energy Physics::Experiment ,Atomic physics ,Sensitivity (electronics) ,Lepton - Abstract
This article presents the MEG II Cylindrical Drift CHamber (CDCH), a key detector for the phase 2 of MEG, which aims at reaching a sensitivity level of the order of $6 \times 10^{-14}$ for the charged Lepton Flavour Violating $\mu^+ \rightarrow \mbox{e}^+ \gamma$ decay. CDCH is designed to overcome the limitations of the MEG $\mbox{e}^+$ tracker and guarantee the proper operation at high rates with long-term detector stability. CDCH is a low-mass unique volume detector with high granularity: 9 layers of 192 drift cells, few mm wide, defined by $\approx 12000$ wires in a stereo configuration for longitudinal hit localization. The total radiation length is $1.5 \times 10^{-3}$ $\mbox{X}_0$, thus minimizing the Multiple Coulomb Scattering (MCS) contribution and allowing for a single-hit resolution of 110 $\mu$m and a momentum resolution of 130 keV/c. CDCH integration into the MEG II experimental apparatus will start in this year., Comment: 2 pages, 3 figures, proceeding at PisaMeeting2018 conference, published in NIMA
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- 2019
19. The ARGO-YBJ experiment in Tibet
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THE ARGO YBJ COLLABORATION G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, D'ALI' STAITI G, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, THE ARGO YBJ COLLABORATION G., Aielli a, B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g
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Physics ,Nuclear and High Energy Physics ,Gamma ray burst ,Single cluster ,Trigger rate ,Detector ,gamma ray bursts, gamma rays, cosmic rays, extended air showers ,Astronomy ,Sampling (statistics) ,Cosmic ray ,Extended air showers, Cosmic rays, Gamma ray sources, Gamma ray bursts ,Gamma ray sources ,Geodesy ,Guard ring ,Extended air shower ,Sampling density ,Instrumentation ,Argo - Abstract
The setting up of the ARGO detector at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China) has been completed during the last spring (2007). It consists of a central carpet made of 130 identical sub-units of 12 RPCs each (a "cluster"), covering a surface of about 5800 m2 with 93% active area, and a guard ring of 24 further clusters of the same type surrounding the central carpet with a lower sampling density. Signals are picked up by external electrodes of small size, thus allowing the sampling of EAS with high space-time granularity. Shower events are detected at a trigger rate of about 4 kHz. Events with a few particles detected by a single cluster are counted in scaler mode on a time base of 500 ms. The intrinsic modularity of the ARGO detector allowed us to collect data even during the setting-up period, using only the central carpet (or even part of it). Some preliminary results from the analysis of events collected in a few months of data taking are presented. © 2008 Elsevier B.V. All rights reserved.
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- 2008
20. The Yangbajing Super Complex Array Plan Based on the ARGO Carpet
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THE ARGO YBJ COLLABORATION G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, THE ARGO YBJ COLLABORATION G., Aielli a, B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, C. F., Feng, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, J. Y., Li, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, Mari, Stefano Maria, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, X. B., Qu, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, L., Xue, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, X. Y., Zhang, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g
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Physics ,Nuclear and High Energy Physics ,Proton ,business.industry ,Detector ,Gamma ray ,Phase (waves) ,Scintillator ,Interference (wave propagation) ,Atomic and Molecular Physics, and Optics ,Optics ,business ,Event (particle physics) ,Argo - Abstract
Following the completion of the 5700m 2 RPC carpet-like AS array at YangBaJing this year, a further plan based on the ARGO Carpet is raised. It characterizes with its high altitude site, its full-coverage detector array and the multi-parameter measurements. Apart from studies on TeV and sub-TeV energy range, UHE Gamma-ray sources and the Knee Physics will become its characteristic subjects. In the first phase of the plan, the Yangbajing Super Complex Array (YSCA) will include a 10 4 m 2 RPC Carpet, five indoor μ -detectors (∼170 m 2 each), four big outdoor μ -detectors (∼432 m 2 each) and a traditional field scintillation detector array surrounding the Carpet. Monte-Carlo study shows that, with such an array in YBJ (4300m a.s.l.), γ -ray induced air showers can be separated from proton induced air showers clearly using only the observed electron and μ data event by event. To assist the classification of UHE air showers induced by different primary nuclei groups without severe interference by Composition/Model Entanglement, a second phase plan having a Central Burst Detector Array (CBDA) and some pulse shape detectors is schemed.
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- 2008
21. The new Trigger/GPS module for the extreme energy events project
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M. Taiuti, Marco Schioppa, F. Coccetti, S. Squarcia, Rosario Nania, C. Avanzini, M. Selvi, S. Grazzi, G. Gemme, G. Batignani, P. La Rocca, Riccardo Paoletti, E. Bossini, A. Corvaglia, G. Terreni, B. Min, F. Palmonari, Antonino Zichichi, M. Panareo, M. Garbini, Luca Baldini, L. Votano, Despina Hatzifotiadou, W. Park, Marcello Abbrescia, M. Battaglieri, Mn Mazziotta, R. Baldini Ferroli, G. Sartorelli, A. Scribano, G. Piragino, M. Rizzi, P. Galeotti, Z. Liu, D. De Gruttola, Giuseppe Mandaglio, Fabrizio Giulio Luca Pilo, Francesco Noferini, F. Nozzoli, E. Scapparone, G. Cocciolo, L. Cifarelli, C. Cicalò, Francesco Riggi, M. C. S. Williams, S. Pisano, Y. Baek, Antonio Trifiro, S. De Pasquale, G. Maron, R. Zuyeuski, L. Perasso, I. Gnesi, C. Ripoli, M. P. Panetta, F. Carnesecchi, E. Coccia, C. Vistoli, A. Costantini, F. L. Fabbri, L. Galante, Giancarlo C. Righini, C. Pellegrino, M.A. Del Rio Viera, M. Trimarchi, S. Boi, Abbrescia, M., Avanzini, C., Baek, Y., Baldini Ferroli, R., Baldini, L., Batignani, G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Cicalò, C., Cifarelli, L., Coccetti, F., Coccia, E., Cocciolo, G., Corvaglia, A., Costantini, A., De Gruttola, D., Del Rio Viera, M. A., De Pasquale, S., Fabbri, F., Galante, L., Galeotti, P., Garbini, M., Gemme, G., Gnesi, I., Grazzi, S., Hatzifotiadou, D., La Rocca, P., Liu, Z., Mandaglio, G., Maron, G., Mazziotta, M. N., Min, B., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Park, W., Pellegrino, C., Perasso, L., Pilo, F., Piragino, G., Pisano, S., Riggi, F., Righini, G., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Squarcia, S., Taiuti, M., Terreni, G., Trifirò, A., Trimarchi, M., Vistoli, C., Votano, L., Williams, M. C. S., Zichichi, A., Zuyeuski, R., Abbrescia M., Avanzini C., Baek Y., Baldini Ferroli R., Baldini L., Batignani G., Battaglieri M., Boi S., Bossini E., Carnesecchi F., Cicalo C., Cifarelli L., Coccetti F., Coccia E., Cocciolo G., Corvaglia A., Costantini A., De Gruttola D., Del Rio Viera M.A., De Pasquale S., Fabbri F., Galante L., Galeotti P., Garbini M., Gemme G., Gnesi I., Grazzi S., Hatzifotiadou D., La Rocca P., Liu Z., Mandaglio G., Maron G., Mazziotta M.N., Min B., Nania R., Noferini F., Nozzoli F., Palmonari F., Panareo M., Panetta M.P., Paoletti R., Park W., Pellegrino C., Perasso L., Pilo F., Piragino G., Pisano S., Riggi F., Righini G., Ripoli C., Rizzi M., Sartorelli G., Scapparone E., Schioppa M., Scribano A., Selvi M., Squarcia S., Taiuti M., Terreni G., Trifiro A., Trimarchi M., Vistoli C., Votano L., Williams M.C.S., Zichichi A., and Zuyeuski R.
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Nuclear and High Energy Physics ,High energy ,Multigap RPC, EAS detection, Muon detections, Trigger system, Time stamping, Timing GPS ,Trigger system ,Multigap RPC ,STRIPS ,law.invention ,law ,EAS detection ,Electronics ,Time stamping ,Instrumentation ,Muon detection ,Physics ,Resistive touchscreen ,business.industry ,Event (computing) ,Muon detections ,Electrical engineering ,Global Positioning System ,Timing GPS ,business ,Energy (signal processing) ,VMEbus - Abstract
The Extreme Energy Event (EEE) project is an experiment devoted to the study of high energy Extensive Air Showers (EAS) over a very large area, using an array of muon telescopes. At present the array is composed of more than 50 stations, most of them distributed across the Italian territory, on a total area of around 3 × 1 0 5 km 2 . The telescopes are based on position-sensitive Multi-gap Resistive Plate Chambers (MRPCs) whose readout strips are connected to two TDC (Time-to-Digital Converter) units. Here a novel VME trigger unit for the EEE telescopes is presented, which also includes an embedded GPS receiver for precision timing applications. This new unit gets together, in the same electronic board, the functionalities of different parts of the electronics used up to now in the EEE experiment, and adds new ones, making the whole readout system simpler, more flexible and robust. Details about the trigger/GPS unit, including some measurements of its time resolution, are reported here.
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- 2019
22. First results from the upgrade of the Extreme Energy Events experiment
- Author
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Despina Hatzifotiadou, M. Battaglieri, W. Park, L. G. Batignani, Francesco Noferini, C. Gustavino, G. Sartorelli, G. Piragino, C. Ripoli, F. Coccetti, L. Votano, Rosario Nania, M. Abbrescia, C. Avanzini, L. Galante, M. Selvi, M. P. Panetta, Giancarlo C. Righini, L. Perasso, E. Bossini, A. Chiavassa, R. Zuyeuski, I. Gnesi, L. Fabbri, P. La Rocca, M. C. Vistoli, F. Palmonari, D. De Gruttola, S. Grazzi, Antonino Zichichi, P. Galeotti, Francesco Riggi, S. Miozzi, R. Baldini Ferroli, Riccardo Paoletti, G. Terreni, G. Gemme, Corrado Cicalo, Luca Baldini, Luisa Cifarelli, M. Taiuti, Mn Mazziotta, M. Rizzi, Fabrizio Giulio Luca Pilo, M. C. S. Williams, Marco Schioppa, Giuseppe Mandaglio, Antonio Trifiro, S. Squarcia, G. Maron, F. Nozzoli, Eugenio Scapparone, M. Trimarchi, O. Maragoto Rodriguez, S. Boi, C. Pellegrino, L. Zheng, Vladimir Frolov, A. Scribano, S. Pisano, S. Serci, F. Carnesecchi, E. Coccia, S. De Pasquale, A. Corvaglia, M. Panareo, M. Garbini, Abbrescia, M., Avanzini, C., Baldini, L., Ferroli, R. Baldini, Batignani, L. G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Chiavassa, A., Cicalo, C., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., Gruttola, D. De, Pasquale, S. De, Fabbri, L., Frolov, V., Galante, L., Galeotti, P., Garbini, M., Gemme, G., Gnesi, I., Grazzi, S., Gustavino, C., Hatzifotiadou, D., Rocca, P. La, Mandaglio, G., Rodriguez, O. Maragoto, Maron, G., Mazziotta, M. N., Miozzi, S., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Park, W., Pellegrino, C., Perasso, L., Pilo, F., Piragino, G., Pisano, S., Riggi, F., Righini, G. C., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Serci, S., Squarcia, S., Taiuti, M., Terreni, G., Trifirò, A., Trimarchi, M., Vistoli, M. C., Votano, L., Williams, M. C. S., Zheng, L., Zichichi, A., Zuyeuski, R., Abbrescia M., Avanzini C., Baldini L., Ferroli R.B., Batignani L.G., Battaglieri M., Boi S., Bossini E., Carnesecchi F., Chiavassa A., Cicalo C., Cifarelli L., Coccetti F., Coccia E., Corvaglia A., Gruttola D., Pasquale S., Fabbri L., Frolov V., Galante L., Galeotti P., Garbini M., Gemme G., Gnesi I., Grazzi S., Gustavino C., Hatzifotiadou D., Rocca P.L., Mandaglio G., Rodriguez O.M., Maron G., Mazziotta M.N., Miozzi S., Nania R., Noferini F., Nozzoli F., Palmonari F., Panareo M., Panetta M.P., Paoletti R., Park W., Pellegrino C., Perasso L., Pilo F., Piragino G., Pisano S., Riggi F., Righini G.C., Ripoli C., Rizzi M., Sartorelli G., Scapparone E., Schioppa M., Scribano A., Selvi M., Serci S., Squarcia S., Taiuti M., Terreni G., Trifiro A., Trimarchi M., Vistoli M.C., Votano L., Williams M.C.S., Zheng L., Zichichi A., and Zuyeuski R.
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Physics - Instrumentation and Detectors ,Computer science ,Clock signal ,FOS: Physical sciences ,Cosmic ray ,01 natural sciences ,030218 nuclear medicine & medical imaging ,Gaseous detectors ,03 medical and health sciences ,0302 clinical medicine ,Muon spectrometer ,0103 physical sciences ,Gaseous detector ,Detectors and Experimental Techniques ,physics.ins-det ,Instrumentation ,Mathematical Physics ,Resistive-plate chambers ,010308 nuclear & particles physics ,business.industry ,Detector ,Electrical engineering ,Instrumentation and Detectors (physics.ins-det) ,Upgrade ,Global Positioning System ,business ,Energy (signal processing) ,Data transmission - Abstract
The Extreme Energy Events (EEE) experiment is the largest system in the world completely implemented with Multigap Resistive Plate Chambers (MRPCs). Presently, it consists of a network of 59 muon telescopes, each made of 3 MRPCs, devoted to the study of secondary cosmic rays. Its stations, sometimes hundreds of kilometers apart, are synchronized at a few nanoseconds level via a clock signal delivered by the Global Positioning System. The data collected during centrally coordinated runs are sent to INFN CNAF, the largest center for scientific computing in Italy, where they are reconstructed and made available for analysis. Thanks to the on-line monitoring and data transmission, EEE operates as a single coordinated system spread over an area of about $3 \times 10^5$ km$^2$. In 2017, the EEE collaboration started an important upgrade program, aiming to extend the network with 20 additional stations, with the option to have more in the future. This implies the construction, testing and commissioning of 60 chambers, for a total detector surface of around 80 m$^2$. In this paper, aspects related to this challenging endeavor are covered, starting from the technological solutions chosen to build these state-of-the-art detectors, to the quality controls and the performance tests carried on., Comment: Prepared for the proceedings of the XIVth Workshop on Resistive Plate Chambers and related detectors, Feb. 19-23/2018, Puerto Vallarta, Jalisco State, MEXICO
- Published
- 2019
23. The EEE MRPC telescopes as tracking tools to monitor building stability with cosmic muons
- Author
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R. Baldini Ferroli, P. La Rocca, M. Taiuti, Rosario Nania, D. De Gruttola, M. Panareo, Marco Schioppa, E. Bossini, C. Avanzini, M. Selvi, L. G. Batignani, M. Garbini, L. Fabbri, A. Scribano, G. Piragino, G. Sartorelli, M. Battaglieri, A. Mulliri, Francesco Riggi, Eugenio Scapparone, L. Perasso, F. Coccetti, S. Squarcia, Z. Liu, L. Votano, F. Palmonari, C. Cicalo, S. Pisano, A. Corvaglia, Despina Hatzifotiadou, L. Galante, G. Serri, Giancarlo C. Righini, M. Trimarchi, C. Ripoli, R. Zuyeuski, I. Gnesi, S. Boi, M. C. S. Williams, Antonio Trifiro, Luisa Cifarelli, G. Maron, R. Paoletti, C. Pellegrino, F. Carnesecchi, E. Coccia, S. De Pasquale, G. Gemme, M. C. Vistoli, S. Grazzi, G. Terreni, P. Galeotti, C. Pinto, Francesco Noferini, M. P. Panetta, Giuseppe Mandaglio, F. Nozzoli, Luca Baldini, Marcello Abbrescia, Mn Mazziotta, M. Rizzi, Antonino Zichichi, Abbrescia M., Avanzini C., Baldini L., Ferroli R.B., Batignani L.G., Battaglieri M., Boi S., Bossini E., Carnesecchi F., Cicalo C., Cifarelli L., Coccetti F., Coccia E., Corvaglia A., De Gruttola D., De Pasquale S., Fabbri L., Galante L., Galeotti P., Garbini M., Gemme G., Gnesi I., Grazzi S., Hatzifotiadou D., La Rocca P., Liu Z., Mandaglio G., Maron G., Mazziotta M.N., Mulliri A., Nania R., Noferini F., Nozzoli F., Palmonari F., Panareo M., Panetta M.P., Paoletti R., Pellegrino C., Perasso L., Pinto C., Piragino G., Pisano S., Riggi F., Righini G.C., Ripoli C., Rizzi M., Sartorelli G., Scapparone E., Schioppa M., Scribano A., Selvi M., Serri G., Squarcia S., Taiuti M., Terreni G., Trifiro A., Trimarchi M., Vistoli M.C., Votano L., Williams M.C.S., Zichichi A., Zuyeuski R., Abbrescia, M., Avanzini, C., Baldini, L., Ferroli, R. Baldini, Batignani, L. G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Cicalo, C., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., Gruttola, D. De, Pasquale, S. De, Fabbri, L., Galante, L., Galeotti, P., Garbini, M., Gemme, G., Gnesi, I., Grazzi, S., Hatzifotiadou, D., Rocca, P. La, Liu, Z., Mandaglio, G., Maron, G., Mazziotta, M. N., Mulliri, A., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Pellegrino, C., Perasso, L., Pinto, C., Piragino, G., Pisano, S., Riggi, F., Righini, G. C., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Serri, G., Squarcia, S., Taiuti, M., Terreni, G., Trifiró, A., Trimarchi, M., Vistoli, M. C., Votano, L., Williams, M. C. S., Zichichi, A., and Zuyeuski, R.
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Resistive-plate chambers ,Physics::Instrumentation and Detectors ,business.industry ,Cosmic ray ,Tracking (particle physics) ,Particle detector ,Calculation methods ,Gaseous imaging and tracking detectors ,Resistiveplate chambers ,Analysis and statistical methods ,Simulation methods and programs ,Environmental science ,Resistiveplate chamber ,Gaseous imaging and tracking detector ,Cosmic muons ,Aerospace engineering ,Analysis and statistical method ,business ,Instrumentation ,Multi-gap Resistive Plate Chambers, MRPC, cosmic ray, EAS ,Mathematical Physics - Abstract
This paper discusses the possibility to employ the Multi-gap Resistive Plate Chambers (MRPC) of the Extreme Energy Events (EEE) Project as muon tracking detectors to monitor the long term stability of civil buildings and structures when used in conjunction with additional detectors, to reconstruct the average direction of the cosmic muon tracks passing through both devices and any small variation over long time acquisition periods. The performance of such setup is discussed and preliminary experimental coincidence results obtained with a 40× 60 cm2scintillator detector operated in the same building with one of the EEE telescopes, at about 15 m vertical distance from it, are presented. Simple Monte Carlo and GEANT simulations were also carried out to evaluate typical acceptance values for the operating conditions employed so far, to extrapolate to other geometrical configurations, and to evaluate multiple scattering effects.
- Published
- 2019
24. Muon polarization in the MEG experiment: predictions and measurements
- Author
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A. M. Baldini, Akira Yamamoto, Z. You, M. De Gerone, W. R. Molzon, Malte Hildebrandt, Z. Hodge, B.I. Khazin, Marco Grassi, G. Chiarello, D. N. Grigoriev, Yu Bao, A. Mtchedlishvili, K. Ieki, S. Nakaura, A. Pepino, G. F. Tassielli, G. Cavoto, A. de Bari, T. I. Kang, P. W. Cattaneo, Hajime Nishiguchi, F. Berg, F. Renga, E. Baracchini, Flavio Gatti, A. Papa, Yuki Fujii, Yusuke Uchiyama, T. Haruyama, S. Ogawa, T. Iwamoto, M. Rossella, Andrey Popov, Michele Biasotti, G. M. A. Lim, L. Galli, S. Dussoni, A. S. Korenchenko, G. Pizzigoni, P.-R. Kettle, G. Rutar, E. Ripiccini, F. Grancagnolo, A. D’Onofrio, N. V. Khomutov, Wataru Ootani, Stefan Ritt, N. P. Kravchuk, D. Nicolò, C. Voena, A. Graziosi, F. Ignatov, K. Yoshida, M. Venturini, D. Kaneko, Ryu Sawada, F. Tenchini, G. Piredda, Satoshi Mihara, G. Signorelli, Yu.V. Yudin, M. Nishimura, F. Sergiampietri, Gianluigi Boca, Fabrizio Cei, C. Chiri, M. Panareo, C. Bemporad, and Toshinori Mori
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Physics ,Particle physics ,Muon ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Order (ring theory) ,7. Clean energy ,01 natural sciences ,Standard Model ,Massless particle ,0103 physical sciences ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Production (computer science) ,Neutrino ,010306 general physics ,Engineering (miscellaneous) ,Energy (signal processing) ,Lepton - Abstract
The MEG experiment makes use of one of the world's most intense low energy muon beams, in order to search for the lepton flavour violating process $\mu^{+} \rightarrow {\rm e}^{+} \gamma$. We determined the residual beam polarization at the thin stopping target, by measuring the asymmetry of the angular distribution of Michel decay positrons as a function of energy. The initial muon beam polarization at the production is predicted to be $P_{\mu} = -1$ by the Standard Model (SM) with massless neutrinos. We estimated our residual muon polarization to be $P_{\mu} = -0.85 \pm 0.03 ~ {\rm (stat)} ~ { }^{+ 0.04}_{-0.05} ~ {\rm (syst)}$ at the stopping target, which is consistent with the SM predictions when the depolarizing effects occurring during the muon production, propagation and moderation in the target are taken into account. The knowledge of beam polarization is of fundamental importance in order to model the background of our ${\megsign}$ search induced by the muon radiative decay: $\mu^{+} \rightarrow {\rm e}^{+} \bar{\nu}_{\mu} \nu_{\rm e} \gamma$.
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- 2016
25. Single-hit resolution measurement with MEG II drift chamber prototypes
- Author
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Fabrizio Cei, M. Venturini, E. Ripiccini, C. Chiri, Marco Grassi, V. Martinelli, E. Baracchini, F. Renga, A. Pepino, F. Tenchini, G. Piredda, G. Chiarello, M. Chiappini, Michele Cascella, L. Galli, S. Dussoni, A. M. Baldini, C. Voena, G. F. Tassielli, D. Nicoló, F. Grancagnolo, G. Signorelli, G. Cavoto, M. Panareo, Baldini, A. M., Baracchini, E., Cavoto, G., Cascella, M., Cei, F., Chiappini, M., Chiarello, Gianluigi, Chiri, Claudio, Dussoni, S., Galli, L., Grancagnolo, F., Grassi, M., Martinelli, V., Nicolò, D., Panareo, Marco, Pepino, Aurora, Piredda, G., Renga, F., Ripiccini, E., Signorelli, G., Tassielli, GIOVANNI FRANCESCO, Tenchini, F., Venturini, M., and Voena, C.
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Materials science ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,chemistry.chemical_element ,FOS: Physical sciences ,Cosmic ray ,muon decay ,Tracking (particle physics) ,lepton flavour violation ,01 natural sciences ,Particle detector ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Optics ,Ionization ,0103 physical sciences ,010306 general physics ,Instrumentation ,Image resolution ,Mathematical Physics ,Helium ,010308 nuclear & particles physics ,business.industry ,Drift chambers, primary ionisation, MEG, tracker, hit resolution ,Instrumentation and Detectors (physics.ins-det) ,Charged particle ,chemistry ,Measuring instrument ,business - Abstract
Drift chambers operated with helium-based gas mixtures represent a common solution for tracking charged particles keeping the material budget in the sensitive volume to a minimum. The drawback of this solution is the worsening of the spatial resolution due to primary ionisation fluctuations, which is a limiting factor for high granularity drift chambers like the MEG II tracker. We report on the measurements performed on three different prototypes of the MEG II drift chamber aimed at determining the achievable single-hit resolution. The prototypes were operated with helium/isobutane gas mixtures and exposed to cosmic rays, electron beams and radioactive sources. Direct measurements of the single hit resolution performed with an external tracker returned a value of 110 $\mu$m, consistent with the values obtained with indirect measurements performed with the other prototypes., Comment: 18 pages, 18 figures
- Published
- 2016
- Full Text
- View/download PDF
26. Calibration and monitoring of the MEG experiment by a proton beam from a Cockcroft–Walton accelerator
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D.N. Grigoriev, M. Rossella, P.-R. Kettle, Luca Galli, A. M. Baldini, Marco Grassi, Flavio Gatti, A. de Bari, Tomiyoshi Haruyama, R. Pazzi, J. Adam, Stefan Ritt, N. P. Kravchuk, M. Panareo, W. R. Molzon, H. Natori, M. Corbo, Donato Nicolo, G. Gallucci, E. Baracchini, D. Mzavia, Fedor Ignatov, Satoshi Mihara, Hajime Nishiguchi, Gianluigi Boca, Tadayoshi Doke, T. Iwamoto, P. W. Cattaneo, M. De Gerone, C. Topchyan, C. Voena, B. Golden, K. Fratini, J. Egger, X. Bai, A. Maki, Malte Hildebrandt, Yu.V. Yudin, N. Curalli, Angela Papa, Yasuhiro Nishimura, C. Cerri, O. Kiselev, A. S. Korenchenko, Wataru Ootani, R. Valle, B.I. Khazin, Akira Yamamoto, Ryu Sawada, Fabrizio Cei, C. Bemporad, F. Renga, A.S. Popov, Giovanni Signorelli, F. Sergiampietri, Yuki Fujii, G. Cavoto, F. Tenchini, G. Piredda, D. Zanello, F. Xiao, Takehiko Mori, Yusuke Uchiyama, and S. Dussoni
- Subjects
Physics ,Nuclear reaction ,Nuclear and High Energy Physics ,Muon ,Spectrometer ,Proton ,Branching fraction ,Particle accelerator ,law.invention ,Calorimeter ,γrays ,Beam monitoring ,Calibration ,CockcroftWalton accelerator ,Instrumentation ,Nuclear physics ,law ,Nucleon - Abstract
The MEG experiment at PSI searches for the decay μ → e γ at a level of ≈ 10 − 13 on the branching ratio BR ( μ → e γ / μ → tot ), well beyond the present experimental limit ( BR ≤ 1.2 × 10 − 11 ) and is sensitive to the predictions of SUSY-GUT theories. To reach this goal the experiment uses one of the most intense continuous surface muon beams available ( ≈ 10 8 μ / s ) and relies on advanced technology (LXe calorimetry, a gradient-field superconducting spectrometer as well as flexible and powerful trigger and acquisition systems). In order to maintain the highest possible energy, time and spatial resolutions for such detector, frequent calibration and monitoring, using a Cockcroft–Walton proton accelerator, are required. The proton beam is brought to the centre of MEG by a special bellows insertion system and travels in a direction opposite to the one of the normal μ ‐ beam . Protons interact with a lithium tetraborate (Li2B4O7) nuclear target and produce one γ (17.6 MeV) from the reaction Li ( p , γ ) 3 7 Be 4 8 or two coincident γ s (11.67 and 4.4 MeV) from the reaction B ( p , γ 1 ) 5 11 C ⁎ 6 12 . The 17.6 MeV γ is used for calibrating and monitoring the LXe calorimeter ( σ E γ / E γ = 3.85 ± 0.15 % at 17.6 MeV) while the coincident 11.67 and 4.4 MeV γ s are used to measure the relative timing of the calorimeter and the spectrometer timing counters ( σ Δ t = 0.450 ± 0.015 ns ).
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- 2011
27. A Full Front End Chain for Drift Chambers
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G. Tassielli, P. Primiceri, F. Grancagnolo, A. Corvaglia, M. Panareo, G. Chiarello, A. Pepino, Francesco Grancagnolo, Marco Panareo, Chiarello, Gianluigi, A., Corvaglia, F., Grancagnolo, Panareo, Marco, Pepino, Aurora, P., Primiceri, and Tassielli, GIOVANNI FRANCESCO
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Nuclear and High Energy Physics ,Engineering ,Signal processing ,Drift tube ,business.industry ,Electrical engineering ,Cluster (spacecraft) ,Front end electronics ,Atomic and Molecular Physics, and Optics ,DAQ ,Front and back ends ,Computer Science::Hardware Architecture ,Chain (algebraic topology) ,Drift chamber ,Electronic engineering ,Multistage amplifier ,Field-programmable gate array ,business - Abstract
We developed a high performance full chain for drift chamber signals processing. The Front End electronics is a multistage amplifier board based on high performance commercial devices. In addition a fast readout algorithm for Cluster Counting and Timing purposes has been implemented on a Xilinx-Virtex 4 core FPGA. The algorithm analyzes and stores data coming from a Helium based drift tube and represents the outcome of balancing between efficiency and high speed performance.
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- 2014
28. A limit for the decay from the MEG experiment
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E. Baracchini, Stefan Ritt, J. Egger, N.P. Kravchuk, F. Xiao, M. Hildebrandt, H. Natori, R. Pazzi, C. Bemporad, Yusuke Uchiyama, A. M. Baldini, G. Piredda, S. Yamada, B. I. Khazin, P.-R. Kettle, Y. Nishimura, G. Gallucci, Y. Hisamatsu, A. Korenchenko, D.N. Grigoriev, A. de Bari, Tomiyoshi Haruyama, Flavio Gatti, M. Panareo, Roberto Di Nardo, F. Ignatov, C. Topchyan, S. Dussoni, V. Tumakov, Satoshi Mihara, M. De Gerone, J. Adam, Hajime Nishiguchi, G. Cecchet, Martin Schneebeli, O. Kiselev, S. Suzuki, C. Cerri, D. Kaneko, R. Valle, G. Cavoto, Ryu Sawada, B. Golden, D. Zanello, G. Boca, Fabrizio Cei, P. W. Cattaneo, W. R. Molzon, C. Voena, T. Iwamoto, L. Galli, T. Doke, A. Barchiesi, A.S. Popov, Angela Papa, D. Mzavia, F. Sergiampietri, Wataru Ootani, A. Maki, Giovanni Signorelli, X. Bai, S. Yamashita, Yu.V. Yudin, M. Grassi, Akira Yamamoto, Toshinori Mori, Donato Nicolo, F. Renga, and Massimo Rossella
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Superconductivity ,Physics ,Nuclear and High Energy Physics ,Photon ,Spectrometer ,Branching fraction ,Physics::Medical Physics ,Analytical chemistry ,chemistry.chemical_element ,Calorimeter ,Nuclear physics ,Positron ,Xenon ,chemistry ,High Energy Physics::Experiment ,Limit (mathematics) ,Lepton flavour violation ,Muon decay - Abstract
A search for the decay μ + → e + γ , performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR ( μ + → e + γ ) ⩽ 2.8 × 10 − 11 (90% C.L.). This corresponds to the measurement of positrons and photons from ∼ 10 14 stopped μ + -decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector.
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- 2010
29. A high performance front end for MEG II tracker
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G. F. Tassielli, A. Pepino, F. Grancagnolo, M. Panareo, G. Chiarello, C. Chiri, C. Pinto, A. Corvaglia, Chiarello, Gianluigi, Chiri, Claudio, Corvaglia, A., Grancagnolo, F., Panareo, Marco, Pepino, Aurora, Pinto, Carlo, and Tassielli, GIOVANNI FRANCESCO
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Physics ,Muon ,Physics::Instrumentation and Detectors ,business.industry ,Bandwidth (signal processing) ,Electrical engineering ,Front end electronics ,Wide Bandwidth ,High Speed Electronic ,Anode ,Front and back ends ,Front End ,Optics ,Positron ,Upgrade ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,business ,Drift Chamber ,Image resolution - Abstract
MEG Experiment Upgrade proposes a major improvement [1] of the sensitivity in the μ →eγ decay [2]. In particular the positron tracking will be performed by means of an upgrade of MEG Drift Chamber that consists in a cylindrical wire drift chamber, with the axis parallel to the muon beam, inspired to the one used in the KLOE experiment [3]. The new tracker, currently under costruction, can achieve a resolution of 100 μm in the measurement of the drift distance to the anode wires. Improving the resolution imposes a high speed and high performance Front End Electronics for signal acquisition. © 2015 IEEE.
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- 2015
30. A new assembly technique of full stereo Drift Chamber for high energy physics experiments
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M. Spedicato, C. Chiri, G. F. Tassielli, A. Miccoli, A. Pepino, G. Chiarello, P. Primiceri, A. Corvaglia, M. Panareo, F. Grancagnolo, C. Pinto, Chiarello, Gianluigi, Chiri, Claudio, Corvaglia, A., Grancagnolo, F., Miccoli, A., Panareo, Marco, Pepino, Aurora, Pinto, Carlo, Primiceri, Patrizio, Spedicato, M., and Tassielli, GIOVANNI FRANCESCO
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Physics ,Particle physics ,Range (particle radiation) ,MEG ,Physics::Instrumentation and Detectors ,Scattering ,business.industry ,Tracking system ,particle trackers ,Software ,Upgrade ,Electromagnetic coil ,Particle ,Granularity ,business ,Drift Chamber ,Lepton Flavor Violation - Abstract
Modern High Energy Physics experiments for the search of extremely rare processes require high resolutions (order of 50-200 keV/c) tracking systems for particle momenta in the range of 50-300 MeV/c, dominated by multiple scattering contributions. We will describe a newly developed construction technique for ultra-low mass, high granularity Drift Chambers fulfilling this goal. These techniques have been successfully implemented at INFN-Lecce and University of Salento and are currently being used for the construction of the Drift Chamber of the MEG upgrade experiment.
- Published
- 2015
31. Application of the Cluster Counting/Timing techniques to improve the performances of high transparency Drift Chamber for modern HEP experiments
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G. Chiarello, A. Corvaglia, G. F. Tassielli, F. Grancagnolo, A. Pepino, F. Renga, C. Voena, G. Cocciolo, M. Panareo, C. Chiri, Chiarello, Gianluigi, Chiri, Claudio, Cocciolo, Giuseppe, Corvaglia, A., Grancagnolo, F., Panareo, Marco, Pepino, Aurora, Renga, F., Tassielli, GIOVANNI FRANCESCO, and Voena, C.
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Physics ,010308 nuclear & particles physics ,Drift Chambers, HEP, cluster counting, particle Identification ,01 natural sciences ,Particle detector ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,0103 physical sciences ,Measuring instrument ,Cluster (physics) ,Electronic engineering ,Transparency (data compression) ,Instrumentation ,Mathematical Physics - Abstract
Ultra-low mass and high granularity Drift Chambers seems to be a better choice for modern HEP experiments, to achieve a good momentum resolution on the charged particle. We present how, in Helium based gas mixture, by counting and measuring the arrival time of each individual ionization cluster and by using statistical tools, it is possible to reconstruct a bias free estimate of the impact parameter and a more discriminant Particle Identification.
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- 2017
32. The construction technique of the high granularity and high transparency drift chamber of MEG II
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G. F. Tassielli, A. Miccoli, G. Chiarello, M. Spedicato, Carlo Pinto, C. Chiri, A. Corvaglia, F. Grancagnolo, M. Panareo, Chiarello, Gianluigi, Chiri, Claudio, Corvaglia, A., Grancagnolo, F., Miccoli, A., Panareo, Marco, Pinto, Carlo, Spedicato, M., and Tassielli, GIOVANNI FRANCESCO
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Physics ,010308 nuclear & particles physics ,Particle model ,business.industry ,01 natural sciences ,Particle detector ,030218 nuclear medicine & medical imaging ,Nuclear physics ,03 medical and health sciences ,0302 clinical medicine ,Optics ,charged lepton flavor violation, MEG, drift chamber ,0103 physical sciences ,Measuring instrument ,Granularity ,Transparency (data compression) ,business ,Instrumentation ,Mathematical Physics - Abstract
The MEG experiment searches for the charged lepton flavor violating decay, μ +→ e+γ. MEG has already determined the world best upper limit on the branching ratio BR
- Published
- 2017
33. Detection of pseudoscalar and scalar mesons at DAfNE with KLOE
- Author
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S. Giovannella, M. Adinolfi, A. Aloisio, F. Ambrosino, A. Andryakov, A. Antonelli, C. Bacci, A. Bankamp, G. Barbiellini, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, G. Cabibbo, R. Caloi, P. Campana, G. Capon, G. Carboni, A. Cardini, G. Cataldi, F. Ceradini, F. Cervelli, F. Cevenini, G. Chiefari, P. Ciambrone, S. Conticelli, E. De Lucia, G. De Robertis, P. De Simone, G. De Zorzi, S. Dell'Agnello, A. Denig, A. Di Domenico, S. Di Falco, A. Doria, E. Drago, O. Erriquez, A. Farilla, G. Felici, A. Ferrari, M.L. Ferrer, G. Finocchiaro, C. Forti, G. Foti, A. Franceschi, P. Franzini, M.L. Gao, P. Gauzzi, V. Golovatyuk, E. Gorini, F. Grancagnolo, E. Graziani, P. Guarnaccia, X. Huang, M. Incagli, L. Ingrosso, Y.Y. Jiang, W. Kim, W. Kluge, V. Kulikov, F. Lacava, G. Lanfranchi, J. Lee-Franzini, T. Lomtadze, C. Luisi, C.S. Mao, A. Martini, W. Mei, L. Merola, R. Messi, S. Miscetti, S. Moccia, M. Moulson, S. Mueller, F. Murtas, M. Napolitano, A. Nedosekin, M. Panareo, L. Pacciani, P. Pagès, M. Palutan, L. Paoluzi, E. Pasqualucci, L. Passalacqua, A. Passeri, V. Patera, E. Petrolo, D. Picca, G. Pirozzi, L. Pontecorvo, M. Primavera, F. Ruggieri, P. Santangelo, E. Santovetti, G. Saracino, R.D. Schamberger, B. Sciascia, A. Sciubba, F. Scuri, I. Sfiligoi, T. Spadaro, E. Spiriti, C. Stanescu, L. Tortora, P. Valente, G. Venanzoni, S. Veneziano, Y. Wu, S., Giovannella, M., Adinolfi, A., Aloisio, F., Ambrosino, A., Andryakov, A., Antonelli, C., Bacci, A., Bankamp, G., Barbiellini, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, P., Branchini, G., Cabibbo, R., Caloi, P., Campana, G., Capon, G., Carboni, A., Cardini, G., Cataldi, F., Ceradini, F., Cervelli, F., Cevenini, G., Chiefari, P., Ciambrone, S., Conticelli, E., DE LUCIA, G., DE ROBERTIS, P., DE SIMONE, G., DE ZORZI, S., Dell'Agnello, A., Denig, A., DI DOMENICO, S., DI FALCO, A., Doria, E., Drago, O., Erriquez, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, G., Foti, A., Franceschi, P., Franzini, M. L., Gao, P., Gauzzi, V., Golovatyuk, Gorini, Edoardo, F., Grancagnolo, E., Graziani, P., Guarnaccia, X., Huang, M., Incagli, L., Ingrosso, Y. Y., Jiang, W., Kim, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., LEE FRANZINI, T., Lomtadze, C., Luisi, C. S., Mao, A., Martini, W., Mei, L., Merola, R., Messi, S., Miscetti, S., Moccia, M., Moulson, S., Mueller, F., Murta, M., Napolitano, A., Nedosekin, Panareo, Marco, L., Pacciani, P., Pagè, M., Palutan, L., Paoluzi, E., Pasqualucci, L., Passalacqua, A., Passeri, V., Patera, E., Petrolo, D., Picca, G., Pirozzi, L., Pontecorvo, Primavera, Margherita, F., Ruggieri, P., Santangelo, E., Santovetti, G., Saracino, R. D., Schamberger, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, T., Spadaro, E., Spiriti, C., Stanescu, L., Tortora, P., Valente, G., Venanzoni, and S. VENEZIANO AND Y., Wu
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Pseudoscalar ,Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,Radiative transfer ,DAFNE ,Event reconstruction - Abstract
Codice SCOPUS: 2-s2.0-0034738246 Codice ISI non disponibile The KLOE experiment at the DAfNE f-factory has just started collecting data. One of the first analysis items is the study of the f radiative decays, which allows us to investigate the nature of light pseudoscalar and scalar mesons. An integrated luminosity of 100 pb−1 is expected for next KLOE run, resulting in 3 × 108 f collected. A detailed simulation and full event reconstruction of both signal and background events indicates a sensitivity reach of 1 ÷ 2% on the branching ratios. Some preliminary studies on real data are also presented, showing a good agreement with MonteCarlo distributions
- Published
- 2000
34. Measurement of thebb¯Cross Section in800GeV/cProton-Silicon Interactions
- Author
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S. Misawa, S. Conetti, Martin M. Block, T. Alexopoulos, M. Cooper, H. C. Ballagh, Gianluca Introzzi, V. Elia, M. Jenkins, K. Hagan-Ingram, Leonard Spiegel, T.Y. Chen, R. P. Smith, M. Haire, P. Torre, E. Gorini, David B. Cline, G. H. Mo, Wannian Yang, M. He, K. Clark, Bradley Cox, B. T. Zou, G. Liguori, E. C. Dukes, W. Selove, A. R. Erwin, C. Durandet, Michael Wayne Arenton, N. Yao, Alexander Ledovskoy, C. T. Murphy, J. Lys, J. G. Sun, V. Golovatyuk, H. H. Bingham, L.R. Fortney, L. Turnbull, C. Wei, P. Creti, L. Antoniazzi, W. Kowald, D. Judd, C. R. Wang, A. Boden, D. E. Wagoner, P. Hanlet, W. Kononenko, K. S. Nelson, A. McManus, P.O. Mazur, N. J. Zhang, F. Grancagnolo, J. Rhoades, Z. L. Cao, Kwong Lau, J. Trischuk, A. Blankman, Stanislav Tokár, Germano Bonomi, V. Pogosyan, S. Ramachandran, G. Corti, and M. Panareo
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Physics ,Proton ,Silicon ,General Physics and Astronomy ,chemistry.chemical_element ,Crystallography ,Cross section (physics) ,Particle decay ,chemistry ,Production (computer science) ,B meson ,Atomic physics ,Nucleon ,Bar (unit) - Abstract
The cross section for b{bar b} production in 800 GeV/c pN interactions has been measured in Fermilab experiment E771 to be 43{sup +27}{sub {minus}17}(stat){sup +7}{sub {minus}7}(syst) nb per nucleon from the observation of events in which both the b and the {bar b} decay semimuonically or a B decays into a J/{psi} followed by J/{psi}{r_arrow}{mu}{sup +}{mu}{sup {minus}} . {copyright} {ital 1998} {ital The American Physical Society}
- Published
- 1999
35. Status of the KLOE experiment at the ø-factory DAΦNE
- Author
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Margherita Primavera, Paolo Franzini, R. Caloi, P. De Simone, S. Miscetti, L. Ingrosso, Alberto Aloisio, A. Moalem, W. Mei, E. Spiriti, Leonardo Merola, H.G. Han, Ashlie Martini, Vincenzo Patera, Cristian Stanescu, P. Branchini, A. Sciubba, P. Campana, Enrico Pasqualucci, G. Felici, R. D. Schamberger, Stefania Spagnolo, E. Valente, G. Cataldi, G. Di Cosimo, S. Weseler, C. De Lucia, A. Nedosekin, G.F. Palama, S. Dell'Angnello, M. Piccolo, L. Paoluzi, G. Cheifari, G. Lanfranchi, Stefano Veneziano, A. G. Denig, P.P. Zhao, C. Forti, G. Corti, F.M. Favero, D. Picca, F. Bossi, A. Pintus, A. Antonelli, Edoardo Gorini, G. Bencivenni, D. Fiore, G. Barbiellini, F. Donno, M.M. Massai, F. Grancagnolo, A. Zott, C. Bloise, Christoph Schwick, A. Passeri, Chao Zhang, E. Drago, Cesare Bini, G. Carboni, C. Bacci, M. Napolitano, Francesco Lacava, U. v. Hagel, L. Tortora, P. Valente, Emilio Petrolo, F. Cervelli, C. Luisi, W. Kluge, S. Di Falco, A. Ferrari, M. Carboni, J.Q. Zhang, P. Guazzi, R. Baldini-Ferroli, O. Erriquez, L. Bucci, R. de Sangro, Andrea Doria, W. Grandegger, R. Messi, G. Venanzoni, A. Andryakov, S. Bertolucci, A. Farilla, F. Ruggieri, G. Capon, A. Galli, M. L. Ferrer, Igor Sfiligoi, S. Conticelli, I. Cohen, V. Bocci, A. Calcaterra, G. De Zorzi, D. Vettoretti, Yuehong Xie, G. Petrucci, G. Cabibbo, C. Curosotti, A. Franceschi, G. Saracino, F. Cevenini, G. Forti, F. Murtas, V. Elia, C. Colantuono, Ludovico Pontecorvo, M. Panareo, Marina Passaseo, A. Di Domenico, V. V. Kulikov, Filippo Ceradini, W. Kim, L. Passalacqua, Teimuraz Lomtadze, M.L. Gao, Paolo Ciambrone, C. Gatto, S.W. Han, G. Finocchiaro, P. Guarnaccia, A. Adinolfi, A. di Benedetto, L. Entesano, E. Graziani, A. Angeletti, V.M. Golovatyuk, G. Pirozz, M. Incagli, Fabrizio Scuri, Juliet Lee-Franzini, S. Giovannella, S. Moccia, E. Santovetti, and S. Conetti
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Detector ,CP violation ,Factory (object-oriented programming) ,Current (fluid) ,Atomic and Molecular Physics, and Optics - Abstract
The CP violation physics program and the detector design are described. The current status of KLOE is summarized.
- Published
- 1998
36. The full-length prototype of the KLOE drift chamber
- Author
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V. Golovatyuk, P. Creti, Paolo Valente, C. Luisi, H. Beker, P. De Simone, D. Picca, C. Bacci, G. Finocchiaro, E. Gorini, S. Spagnolo, Enrico Pasqualucci, C Avanzini, W. Grandegger, R. Messi, F. Grancagnolo, Francesco Lacava, W. Kluge, F. Donno, G. Cataldi, Filippo Ceradini, G. Margutti, E. De Lucia, M. Panareo, Vincenzo Patera, L. Paoluzi, G. Bencivenni, V. Elia, Ludovico Pontecorvo, A. Andryakov, G. Felici, A. Denig, L. Bucci, M. Primavera, U. vonHagel, A., Andryakov, C., Avanzini, C., Bacci, H., Beker, G., Bencivenni, L., Bucci, G., Cataldi, F., Ceradini, P., Creti, E., De Lucia, A., Denig, P., De Simone, F., Donno, Elia, Valerio, G., Felici, G., Finocchiaro, V., Golovatyuk, Gorini, Edoardo, F., Grancagnolo, W., Grandegger, U., Vonhagel, W., Kluge, F., Lacava, C., Luisi, G., Margutti, R., Messi, Panareo, Marco, L., Paoluzi, E., Pasqualucci, V., Patera, D., Picca, L., Pontecorvo, Primavera, Margherita, Spagnolo, Stefania Antonia, and P., Valente
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,Track (disk drive) ,Resolution (electron density) ,Detector ,Function (mathematics) ,Momentum ,Nuclear physics ,KLOE ,CP violation ,High Energy Physics::Experiment ,Instrumentation ,Beam (structure) - Abstract
The main goal of the KLOE experiment is the study of CP violation in the K mesons system, with an accuracy of 10−4 in the measurement of Re( e′ e ) . This task imposes strong constraints on the design and operation of the drift chamber, which must reconstruct the charged decays of low momentum KL's and KS's with high efficiency and high resolution. A full-length prototype of the chamber has been built and tested on a 50 GeV/c beam. The analysis of the large sample of data has allowed a detailed study of the time to distance relations as a function of the track parameters and of the peculiar geometry of the drift cell. The detector performance, in terms of efficiency, spatial resolutions and d E d χ resolution, is illustrated and discussed.
- Published
- 1998
37. Differential cross sections ofJ/ψandψ′in 800 GeV/c p-Si interactions
- Author
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Stanislav Tokár, Germano Bonomi, L. Turnbull, J. Lys, J. G. Sun, Michael Wayne Arenton, M. Jenkins, H. H. Bingham, P. Torre, D. E. Wagoner, Gianluca Introzzi, R. P. Smith, M. Haire, L.R. Fortney, M. Panareo, A. McManus, W. Selove, Wannian Yang, W. Kowald, H. C. Ballagh, T. Alexopoulos, Kwong Lau, C. T. Murphy, D. Judd, K. Clark, B. T. Zou, S. Conetti, V. Pogosian, S. Ramachandran, G. Corti, P. Hanlet, V. Golovatyuk, G. H. Mo, W. Kononenko, K. S. Nelson, M. Cooper, Bradley Cox, David B. Cline, P.O. Mazur, E. Gorini, C. Durandet, A. Blankman, M. He, Catherine A. Dukes, Alexander Ledovskoy, C. Wei, J. Trischuk, Z. L. Cao, P. Creti, L. Antoniazzi, A. Boden, Martin M. Block, N. J. Zhang, V. Elia, F. Grancagnolo, J. Rhoades, A. R. Erwin, T.Y. Chen, K. Hagan-Ingram, Leonard Spiegel, N. Yao, G. Liguori, S. Misawa, and C. R. Wang
- Subjects
Physics ,Quantum chromodynamics ,Nuclear and High Energy Physics ,Particle physics ,Color model ,Muon ,Octet ,Order (ring theory) ,High Energy Physics::Experiment ,Production (computer science) ,Parton ,Energy (signal processing) - Abstract
We present the x{sub F} and p{sub T} differential cross sections of J/{psi} and {psi}{sup {prime}}, respectively, in the ranges {minus}0.05{lt}x{sub F}{lt}0.25 and p{sub T}{lt}3.5 GeV/c. The data samples are constituted by about 12000 J/{psi} and 200 {psi}{sup {prime}} produced in proton-silicon interactions at 800 GeV/c and decaying into opposite sign muons. The x{sub F} and p{sub T} distributions are compared with recent results from experiments E789 at the same energy and to leading order QCD predictions using the MRS D0 parametrization for the parton structure function. The measured shapes of the differential cross sections, except for the d{sigma}/dx{sub F} at small x{sub F}, agree very well with the prediction, even though their value is quite a bit larger than the prediction. We also present the cos{theta} differential cross section of the J/{psi} which indicates unpolarized production in contrast with color octet models predictions. {copyright} {ital 1997} {ital The American Physical Society}
- Published
- 1997
38. A full acquisition and elaboration system for Drift Chambers
- Author
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A. Pepino, Michele Cascella, F. Grancagnolo, A. Corvaglia, M. Panareo, G. Tassielli, M., Cascella, A., Corvaglia, F., Grancagnolo, Panareo, Marco, Pepino, Aurora, and Tassielli, GIOVANNI FRANCESCO
- Subjects
business.industry ,Computer science ,Electrical engineering ,Process (computing) ,front end electronic ,analog front end ,nuclear electronics ,GeneralLiterature_MISCELLANEOUS ,Signal acquisition ,Analog front-end ,drift chamber ,Signal processing algorithms ,Noise (video) ,business ,Field-programmable gate array ,Computer hardware ,Elaboration - Abstract
We propose a fast acquisition and elaboration system in order to process signals coming from Drift Chambers. The system is made of an analog Front End, designed in our laboratory for signal acquisition and a Demo Board by Texas Instruments for data elaboration. The Front End electronics is a multistage amplifier board based on high performance commercial devices. Texas Instruments board includes an Analog to Digital Converter and a FPGA (Field Programmable Gate Array) in order to implement algorithm for Cluster Counting and Timing purposes.
- Published
- 2013
39. A readout electronics for drift chambers signals processing
- Author
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Giovanni Tassielli, F. Grancagnolo, Patrizio Primiceri, A. Pepino, Michele Cascella, M. Panareo, Alessandro Corvaglia, Yuri Yudin, Daniela De Venuto, A., Corvaglia, F., Grancagnolo, Pepino, Aurora, P., Primiceri, Tassielli, GIOVANNI FRANCESCO, Panareo, Marco, M., Cascella, and Y., Yudin
- Subjects
High Speed ADC ,Engineering ,Signal processing ,business.industry ,Amplifier ,Electrical engineering ,Readout electronics ,Helium based drift cell ,Front end electronics ,Low noise ,Computer Science::Hardware Architecture ,Electronic engineering ,cluster counting ,Multistage amplifier ,business ,Field-programmable gate array - Abstract
A low noise, high speed board designed for drift chamber signals processing has been developed. The Front End electronics is a multistage amplifier based on high performance commercial devices. In addition, a fast readout algorithm for Cluster Counting and Timing purposes has been implemented on a Xilinx-Virtex 4 core FPGA. The algorithm analyzes and stores data coming from a Helium based drift cell and represents the outcome of balancing between efficiency and high speed performance.
- Published
- 2013
40. New Constraint on the Existence of theμ+→e+γDecay
- Author
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H. Natori, X. Bai, L. Galli, C. Cerri, Stefan Ritt, P. W. Cattaneo, Flavio Gatti, Giovanni Signorelli, Yasunori Fujii, M. Panareo, T. Iwamoto, Y. Hisamatsu, O. Kiselev, Y. Nishimura, Akira Yamamoto, A. Maki, A. M. Baldini, C. Voena, A. Graziosi, A. S. Korenchenko, P.R. Kettle, F. Sergiampietri, E. Baracchini, B. Golden, C. Bemporad, A.S. Popov, Roberto Di Nardo, F.V. Ignatov, Z. You, Wataru Ootani, B.I. Khazin, N. Kravchuk, G. Cavoto, F. Tenchini, J. Egger, A. de Bari, Satoru Yamashita, G. Piredda, Tomiyoshi Haruyama, S. Yamada, Ryu Sawada, D. Mzavia, D.N. Grigoriev, G. Boca, F. Xiao, Fabrizio Cei, N. Khomotov, G. M. A. Lim, M. De Gerone, Takehiko Mori, Yusuke Uchiyama, W. R. Molzon, Marco Grassi, M. Hildebrandt, Donato Nicolo, S. Suzuki, S. Dussoni, M. Rossella, D. Zanello, D. Kaneko, Yu.V. Yudin, Satoshi Mihara, Tadayoshi Doke, F. Renga, E. Ripiccini, J. Adam, Angela Papa, Hajime Nishiguchi, and C. Topchyan
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Physics ,Particle physics ,Muon ,Branching fraction ,General Physics and Astronomy ,Supersymmetry ,Lepton - Abstract
The analysis of a combined data set, totaling $3.6\ifmmode\times\else\texttimes\fi{}{10}^{14}$ stopped muons on target, in the search for the lepton flavor violating decay ${\ensuremath{\mu}}^{+}\ensuremath{\rightarrow}{e}^{+}\ensuremath{\gamma}$ is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of $5.7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$ (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG.
- Published
- 2013
41. Search for the Flavor Changing Neutral Current DecayD0→μ+μ−in 800 GeV Proton-Silicon Interactions
- Author
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T. Alexopoulos, L. Antoniazzi, M. Arenton, H. C. Ballagh, H. Bingham, A. Blankman, M. Block, A. Boden, G. Bonomi, S. V. Borodin, J. Budagov, Z. L. Cao, G. Cataldi, T. Y. Chen, K. Clark, D. Cline, S. Conetti, M. Cooper, G. Corti, B. Cox, P. Creti, E. C. Dukes, C. Durandet, V. Elia, A. R. Erwin, E. Evangelista, L. Fortney, V. Golovatyuk, E. Gorini, F. Grancagnolo, K. Hagan-Ingram, M. Haire, P. Hanlet, M. He, G. Introzzi, M. Jenkins, J. Jennings, D. Judd, W. Kononenko, W. Kowald, K. Lau, T. Lawry, A. Ledovskoy, G. Liguori, J. Lys, P. O. Mazur, A. McManus, S. Misawa, G. Mo, C. T. Murphy, K. Nelson, M. Panareo, V. Pogosian, S. Ramachandran, M. Recagni, J. Rhoades, J. Segal, W. Selove, R. P. Smith, L. Spiegel, J. G. Sun, S. Tokar, P. Torre, J. Trischuk, L. Turnbull, I. Tzamouranis, D. E. Wagoner, C. R. Wang, C. Wei, W. Yang, N. Yao, N. J. Zhang, S. N. Zhang, and B. T. Zou
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Nuclear physics ,Physics ,Particle physics ,Silicon ,chemistry ,Proton ,Branching fraction ,Flavor-changing neutral current ,General Physics and Astronomy ,chemistry.chemical_element ,Limit (mathematics) ,Fermilab - Abstract
We have searched for the flavor changing neutral current decay Do + p-l+p”in the dimuon data obtained by the E771 experiment conducted at Fermilab. No evidence is found. A branching ratio of (-1.0 ‘A:,’ f 0.2) x 10v6 is obtained, corresponding to a 90% confidence level upper limit of 3.3 x 10m6. This new upper limit is about three times more sensitive than the best published limit. (Submitted to Physical Review Letters)
- Published
- 1996
42. The Fermilab E771 spectrometer A large aperture spectrometer to study charm and beauty states as detected by decays into muons
- Author
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H.C. Ballagh, E. Gorini, C. R. Wang, S. Ramachandran, C. T. Murphy, Z. L. Cao, M. Panareo, C. Durandet, W. Selove, J. Lys, H. H. Bingham, M. He, J. Jennings, S. Misawa, Kwong Lau, Peter Mazur, T. Alexopoulos, P. Hanlet, J. Budagov, S. Conetti, P. Creti, K. S. Nelson, J. Trischuk, L. Antoniazzi, W. Yang, C. Wei, V. Elia, A. P. McManus, D. E. Wagoner, K. Hagan-Ingram, M. Jenkins, P. Torre, A. Boden, T. Lawry, R. P. Smith, M. Haire, V. Golovatyuk, Leonard Spiegel, C. Dukes, A. Blankman, S.N. Zhang, L. Fortney, W. Kononenko, G. Corti, E. Evangelista, G. Liguori, I. Tzamouranis, M. Recagni, D. Judd, A. Erwin, N. J. Zhang, F. Grancagnolo, J. Rhoades, Gianluca Introzzi, S.V. Borodin, Martin M. Block, Germano Bonomi, V. Pogosyan, T.Y. Chen, S. Tokar, N. Yao, G. H. Mo, Bradley Cox, G. Cataldi, M. Arenton, M. Cooper, David B. Cline, K. Clark, B. T. Zou, J. Segal, A. Ledovskoy, W. Kowald, L. Turnbull, J. G. Sun, T., Alexopoulo, L., Antoniazzi, M., Arenton, H. C., Ballagh, H., Bingham, A., Blankman, M., Block, A., Boden, G., Bonomi, S. V., Borodin, J., Budagov, Z. L., Cao, G., Cataldi, T. Y., Chen, K., Clark, D., Cline, S., Conetti, M., Cooper, G., Corti, B., Cox, P., Creti, C., Duke, C., Durandet, Elia, Valerio, A. R., Erwin, E., Evangelista, L., Fortney, V., Golovatyuk, Gorini, Edoardo, F., Grancagnolo, M., Haire, P., Hanlet, M., He, G., Introzzi, M., Jenkin, J., Jenning, D., Judd, W., Kononenko, W., Kowald, K., Lau, T., Lawry, A., Ledovskoy, G., Liguori, J., Ly, P. O., Mazur, A. P., Mcmanu, S., Misawa, G. H., Mo, C. T., Murphy, K., Nelson, Panareo, Marco, V., Pogosyan, S., Ramachandran, M., Recagni, J., Rhoade, J., Segal, W., Selove, R. P., Smith, L., Spiegel, J. G., Sun, S., Tokar, P., Torre, J., Trischuk, L., Turnbull, I., Tzamourani, D. E., Wagoner, C. R., Wang, C., Wei, W., Yang, N., Yao, N. J., Zhang, S. N., Zhang, and B. T., Zou
- Subjects
Physics ,GLASS ARRAY ,Nuclear and High Energy Physics ,Resistive touchscreen ,Particle physics ,Muon ,Proton ,Spectrometer ,Physics::Instrumentation and Detectors ,GEV POSITRONS ,SHOWER ,Large aperture ,PERFORMANCE ,RESISTIVE PLATE COUNTERS ,Nuclear physics ,RADIATION-DAMAGE ,High mass ,High Energy Physics::Experiment ,Fermilab ,Charm (quantum number) ,CALORIMETER ,Nuclear Experiment ,Instrumentation ,SYSTEM ,TRIGGER - Abstract
This paper describes the final incarnation of the Fermilab High Intensity Lab spectrometer which operated for ten years in the Proton West Area of Fermilab in the execution of two experiments (E537 and E705) which studied hadroproduction of high mass dimuon pairs. The version of the spectrometer used in E771 differed from earlier versions of the spectrometer by the addition of a silicon microstrip detector, pad chambers and resistive plate counters. These additions were implemented to give the spectrometer the capability of detection of secondary decay vertices from B --> mu or B --> J/psi --> mu mu decays. As discussed, the spectrometer in a short data taking period was able to address many kinds of physics, other than beauty decays.
- Published
- 1996
43. Production of , ψ′ and γ in 800 GeV/c proton-silicon interactions
- Author
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M. Cooper, J. Lys, H. H. Bingham, David B. Cline, A. Blankman, R. P. Smith, W. Kowald, M. Jenkins, J. Jennings, K. S. Nelson, J. G. Sun, P. Torre, C. Dukes, H. C. Ballagh, L.R. Fortney, M. Panareo, T. Alexopoulos, A. P. McManus, P.O. Mazur, Michael Wayne Arenton, G. Corti, E. Evangelista, M. He, D. E. Wagoner, K. Clark, B. T. Zou, S. Ramachandran, C. R. Wang, C. T. Murphy, W. Selove, Wannian Yang, Alexander Ledovskoy, J. Segal, V. Golovatyuk, Stanislav Tokár, S. Conetti, Germano Bonomi, S.N. Zhang, J. Trischuk, V. Pogosyan, T. Lawry, P. Hanlet, Kwong Lau, E. Gorini, C. Wei, I. Tzamouranis, C. Durandet, Gianluca Introzzi, S.V. Borodin, G. H. Mo, Bradley Cox, D. Judd, V. Elia, K. Hagan-Ingram, Leonard Spiegel, M. Recagni, W. Kononenko, Z. L. Cao, G. Cataldi, M. Haire, Martin M. Block, A. R. Erwin, A. Boden, T.Y. Chen, L. Turnbull, N. Yao, N. J. Zhang, F. Grancagnolo, J. Rhoades, G. Liguori, S. Misawa, J. Budagov, P. Creti, and L. Antoniazzi
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Cross section (physics) ,Spectrometer ,High intensity ,Prime (order theory) - Abstract
We report on the analysis of Charmonium and Bottomium states produced in p-Si interactions at s =38.7 GeV . The data have been collected with the open geometry spectrometer of the E771 Experiment at the FNAL High Intensity Lab. J ψ , ψ′ and γ total cross sections as well as the ratio B(ψ′ → μμ)σ(ψ′) (B( J ψ → μμ)σ( J ψ )) have been measured. Results are compared with theoretical predictions and with results at other energies.
- Published
- 1996
44. FNAL E771 RPC muon trigger
- Author
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P. Torre, G. Cataldi, Gianluca Introzzi, M. Panareo, F. Grancagnolo, V. Elia, G. Corti, Edoardo Gorini, L. Antoniazzi, P. Creti, Bradley Cox, Germano Bonomi, M. Recagni, S. Conetti, G. Liguori, T. Lawry, L., Antoniazzi, G., Bonomi, G., Introzzi, G., Liguori, P., Torre, G., Cataldi, P., Creti, Elia, Valerio, Gorini, Edoardo, F., Grancagnolo, Panareo, Marco, S., Conetti, G., Corti, B., Cox, T., Lawry, and M., Recagni
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Resistive touchscreen ,High energy ,Particle physics ,Muon ,Fermilab ,RESISTIVE PLATE COUNTERS ,Instrumentation - Abstract
A fast first level muon trigger, developed for and used in experiment E771 at Fermilab, for selecting events containing high energy muons, is described. The trigger finds events by matching the hits information received from three planes of Resistive Plate Counters (RPC). The entire process, accomplished within 450 ns, reduces the total interaction rate by a factor of similar to 10(2) for the single muon trigger and a factor of similar to 10(4) for the dimuon trigger. The capability and performances of the trigger system are described.
- Published
- 1995
45. Search for the lepton flavour violating decay $$\mu ^+ \rightarrow \mathrm {e}^+ \gamma $$ µ + ? e + ? with the full dataset of the MEG experimentMEG Collaboration
- Author
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Toshinori Mori, M. Hildebrandt, Donato Nicolo, N. V. Khomutov, T. I. Kang, Francesco Grancagnolo, Z. Hodge, G. Boca, Marco Grassi, A. Mtchedilishvili, A. Pepino, Akira Yamamoto, A. Popov, Roberto Di Nardo, E. Baracchini, A. Corvaglia, D. Mzavia, G. Tassielli, Flavio Gatti, M. De Gerone, S. Ogawa, J. Egger, Fabio Morsani, A. Maki, Michele Biasotti, Yasunori Fujii, Satoshi Mihara, F. Berg, S. Nakaura, C. Voena, G. Rutar, E. Ripiccini, N. Kravchuk, G. M. A. Lim, Angela Papa, Wataru Ootani, C. Chiri, A. S. Korenchenko, G. Pizzigoni, D. Zanello, F. Ignatov, B.I. Khazin, C. Bemporad, Yury V. Yudin, S. Orito, Yusuke Uchiyama, S. Dussoni, A. D’Onofrio, T. Iwamoto, F. Renga, F. Sergiampietri, A. Graziosi, P.R. Kettle, G. Chiarello, Hajime Nishiguchi, M. Venturini, D. N. Grigoriev, Ryu Sawada, M. Nishimura, G. Signorelli, Fabrizio Cei, F. Tenchini, G. Cavoto, G. Piredda, Yu Bao, W. R. Molzon, Z. You, Michele Cascella, Roberto Pazzi, Tadayoshi Doke, P. W. Cattaneo, A. M. Baldini, M. Panareo, L. Galli, F. Raffaelli, Kayo Yoshida, Stefan Ritt, C. Cerri, K. Ieki, M. Simonetta, A. de Bari, Tomiyoshi Haruyama, D. Kaneko, and M. Rossella
- Subjects
Physics ,Particle physics ,Antiparticle ,Muon ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,Branching fraction ,High Energy Physics::Phenomenology ,Elementary particle ,01 natural sciences ,Lepton number ,Nuclear physics ,Particle decay ,Antimatter ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Engineering (miscellaneous) ,Lepton - Abstract
The final results of the search for the lepton flavour violating decay $$\mathrm {\mu }^+ \rightarrow \mathrm {e}^+ \mathrm {\gamma }$$ based on the full dataset collected by the MEG experiment at the Paul Scherrer Institut in the period 2009–2013 and totalling $$7.5\times 10^{14}$$ stopped muons on target are presented. No significant excess of events is observed in the dataset with respect to the expected background and a new upper limit on the branching ratio of this decay of $$ \mathcal{B} (\mu ^+ \rightarrow \mathrm{e}^+ \gamma ) < 4.2 \times 10^{-13}$$ (90 % confidence level) is established, which represents the most stringent limit on the existence of this decay to date.
- Published
- 2016
46. Calibration and reconstruction performances of the KLOE electromagnetic calorimeter
- Author
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M. Adinolfi, A. Aloisio, F. Ambrosino, A. Andryakov, A. Antonelli, M. Antonelli, F. Anulli, C. Bacci, A. Bankamp, G. Barbiellini, F. Bellini, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, S.A. Bulychjov, G. Cabibbo, A. Calcaterra, R. Caloi, P. Campana, G. Capon, G. Carboni, A. Cardini, M. Casarsa, G. Cataldi, F. Ceradini, F. Cervelli, F. Cevenini, G. Chiefari, P. Ciambrone, S. Conetti, S. Conticelli, E.De Lucia, G.De Robertis, R.De Sangro, P.De Simone, G.De Zorzi, S. Dell'Agnello, A. Denig, A.Di Domenico, C.Di Donato, S.Di Falco, A. Doria, E. Drago, V. Elia, O. Erriquez, A. Farilla, G. Felici, A. Ferrari, M.L. Ferrer, G. Finocchiaro, C. Forti, A. Franceschi, P. Franzini, M.L. Gao, C. Gatti, P. Gauzzi, S. Giovannella, V. Golovatyuk, E. Gorini, F. Grancagnolo, W. Grandegger, E. Graziani, P. Guarnaccia, U.V. Hagel, H.G. Han, S.W. Han, X. Huang, M. Incagli, L. Ingrosso, Y.Y. Jang, W. Kim, W. Kluge, V. Kulikov, F. Lacava, G. Lanfranchi, J. Lee-Franzini, F. Lomtadze, C. Luisi, C.S. Mao, M. Martemianov, M. Matsyuk, W. Mei, L. Merola, R. Messi, S. Miscetti, A. Moalem, S. Moccia, M. Moulson, S. Mueller, F. Murtas, M. Napolitano, A. Nedosekin, M. Panareo, L. Pacciani, P. Pagès, M. Palutan, L. Paoluzi, E. Pasqualucci, L. Passalacqua, M. Passaseo, A. Passeri, V. Patera, E. Petrolo, G. Petrucci, D. Picca, G. Pirozzi, C. Pistillo, M. Pollack, L. Pontecorvo, M. Primavera, F. Ruggieri, P. Santangelo, E. Santovetti, G. Saracino, R.D. Schamberger, C. Schwick, B. Sciascia, A. Sciubba, F. Scuri, I. Sfiligoi, J. Shan, P. Silano, T. Spadaro, S. Spagnolo, E. Spiriti, C. Stanescu, G.L. Tong, L. Tortora, E. Valente, P. Valente, B. Valeriani, G. Venanzoni, S. Veneziano, Y. Wu, Y.G. Xie, P.P. Zhao, Y. Zhou, M., Adinolfi, A., Aloisio, F., Ambrosino, A., Andryakov, A., Antonelli, M., Antonelli, F., Anulli, C., Bacci, A., Bankamp, G., Barbiellini, F., Bellini, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, P., Branchini, S. A., Bulychov, G., Cabibbo, A., Calcaterra, R., Caloi, P., Campana, G., Capon, G., Carboni, A., Cardini, M., Casarsa, G., Cataldi, F., Ceradini, F., Cervelli, F., Cevenini, G., Chiefari, P., Ciambrone, S., Conetti, S., Conticelli, E., DE LUCIA, G., DE ROBERTIS, R., DE SANGRO, P., DE SIMONE, G., DE ZORZI, S., Dell'Agnello, A., Denig, A., DI DOMENICO, C., DI DONATO, S., DI FALCO, A., Doria, E., Drago, V., Elia, O., Erriquez, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, A., Franceschi, P., Franzini, M. L., Gao, C., Gatti, P., Gauzzi, S., Giovannella, V., Golovatyuk, Gorini, Edoardo, F., Grancagnolo, W., Grandegger, E., Graziani, P., Guarnaccia, U., VON HAGEL, H. G., Han, S. W., Han, X., Huang, M., Incagli, L., Ingrosso, Y. Y., Jang, W., Kim, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., LEE FRANZINI, F., Lomtadze, C., Luisi, C. S., Mao, M., Martemyanov, M., Matsyuk, W., Mei, L., Merola, R., Messi, S., Miscetti, A., Moalem, S., Moccia, M., Moulson, S., Mueller, F., Murta, M., Napolitano, A., Nedosekin, Panareo, Marco, L., Pacciani, P., Page, M., Palutan, L., Paoluzi, E., Pasqualucci, L., Passalacqua, M., Passaseo, A., Passeri, V., Patera, E., Petrolo, G., Petrucci, D., Picca, G., Pirozzi, C., Pistillo, M., Pollack, L., Pontecorvo, Primavera, Margherita, F., Ruggieri, P., Santangelo, E., Santovetti, G., Saracino, R. D., Schamberger, C., Schwick, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, J., Shan, P., Silano, T., Spadaro, Spagnolo, Stefania Antonia, E., Spiriti, C., Stanescu, G. L., Tong, L., Tortora, E., Valente, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, Y., Wu, Y. G., Xie, P. P., Zhao, Y., Zhou, Aloisio, Alberto, Ambrosino, Fabio, S. A., Bulychjov, Chiefari, Giovanni, E. D., Lucia, G. D., Roberti, R. D., Sangro, P. D., Simone, G. D., Zorzi, A. D., Domenico, C. D., Donato, S. D., Falco, E., Gorini, U. V., Hagel, J., Lee Franzini, M., Martemianov, Merola, Leonardo, Napolitano, Marco, M., Panareo, M., Primavera, Saracino, Giulio, and S., Spagnolo
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,Calorimeter (particle physics) ,Scintillation counter ,Calibration ,Measuring instrument ,Radiative transfer ,CP violation ,Instrumentation ,Particle detector ,Energy (signal processing) - Abstract
The main aim of the KLOE experiment at DA Phi NE, the Frascati phi -factory, is to study CP violation in the K-0-(K) over bar (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% rootE/GeV is achieved together with a linearity in energy response better than 1% above 50 MeV. A time resolution of similar to 54 ps/ rootE/GeV is also measured on samples of radiative Bhabha and Phi decays. (C) 2001 Elsevier Science B.V. Ail rights reserved.
- Published
- 2001
47. Gamma-ray astronomy and cosmic-ray physics with ARGO-YBJ
- Author
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C. Q. Liu, X. Y. Zhang, H. Y. Jia, A. K. Calabrese Melcarne, P. Creti, Li J. Y., Giovanni Mancarella, I. Bolognino, P. Vallania, Wu C. Y., S. Catalanotti, P. Pistilli, H. M. Zhang, G. Marsella, X. X. Zhou, M. Iacovacci, M. Zha, Carla Bleve, M. Panareo, Stefano Maria Mari, B. S. Wang, M. Dattoli, Zhaxisangzhu, L. Xue, S. W. Cui, X. H. Ding, L. Zhang, Huaguang Wang, Roberto Cardarelli, Q. Q. Zhu, A. Surdo, Fudong Shi, Q. B. Gou, Qu X. B., G. Di Sciascio, X. X. Yan, Lu H., Y. H. Tan, Y. Q. Guo, Q. Huang, He H. H., X. C. Yang, Antonio Budano, Haibing Hu, I. De Mitri, Zihuang Cao, Zhenyong Feng, Bi X. J., Jilong Zhang, A. Pagliaro, P. R. Shen, C. Cattaneo, Jianli Zhang, J. Liu, T. L. Chen, Y. B. Chen, Y. Zhang, Irina James, Paolo Camarri, D. Martello, P. Salvini, S. Vernetto, Zhaxiciren, P. Bernardini, L. Perrone, A. F. Yuan, Z. G. Yao, C. Liu, T. Di Girolamo, Xu B., B. Panico, Danzengluobu, S. Mastroianni, Li H. J., R. Santonico, C. F. Feng, B. Z. Dai, Paolo Montini, G. D’Al´ı Staiti, E. Giroletti, Carlo Vigorito, R. Iuppa, Cristian Stanescu, P. Branchini, Hongbo Hu, X. D. Sheng, Labaciren, M. Y. Liu, G. Liguori, Wu H. R., F. Ruggieri, B. D'Ettorre Piazzoli, Q. Y. Yang, G. Zizzi, F. R. Zhu, Chang-Chun Ning, Zhaoyang Feng, Li X. X., P. F. Zhang, Ma X. H., and S. Z. Chen
- Subjects
Physics ,Astronomy ,Cosmic ray ,Gamma-ray astronomy ,Solar physics - Published
- 2012
48. Results from the analysis of data collected with a 50m(2) RPC carpet at YangBaJing
- Author
-
THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, Bacci, C., Bao, K. Z., Barone, F., Bartoli, B., Bernardini, P., Bussino, S., Calloni, E., Cao, B. Y., Cardarelli, R., Catalanotti, S., Cavaliere, A., Cavaliere, S., Cesaroni, F., Creti, P., Danzengluobu, D'ETTORRE PIAZZOLI, B., DE VINCENZI, M., DI GIROLAMO, T., DI SCIASCIO, G., Feng, Z. Y., Fu, Y., Gao, X. Y., Geng, Q. X., Guo, H. W., H. H., He, He, M., Huang, Q., Iacovacci, M., Iucci, N., Jai, H. Y., Kong, F. M., Kuang, H. H., Labaciren, Li, B., J. Y., Li, Liu, Z. Q., Lu, H., X. H., Ma, Mancarella, G., Mari, S. M., Marsella, Giovanni, Martello, Daniele, Mei, D. M., Meng, X. R., Milano, L., Mu, J., Panareo, Marco, Pellizzoni, G., Peng, Z. R., Pinto, C., Pistilli, P., Reali, E., Santonico, R., Sbarra, C., Shen, P. R., Stanescu, C., Su, J., Sun, L. R., Sun, S. C., Surdo, A., Tan, Y. H., Vernetto, S., Wang, C. R., Wang, H., Wang, H. Y., Wei, Y. N., Yang, H. T., Yao, Q. K., G. C., Yu, Yue, X. D., Yuan, A. F., Zhang, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhaxisangzhu, Zhaxiciren, Zhu, Q. Q., C., Bacci, K. Z., Bao, F., Barone, Bartoli, Bruno, P., Bernardini, S., Bussino, Calloni, Enrico, B. Y., Cao, R., Cardarelli, Catalanotti, Sergio, A., Cavaliere, S., Cavaliere, F., Cesaroni, P., Creti, D'ETTORRE PIAZZOLI, Benedetto, M. D., Vincenzi, DI GIROLAMO, Tristano, G. D., Sciascio, Z. Y., Feng, Y., Fu, X. Y., Gao, Q. X., Geng, H. W., Guo, M., He, Q., Huang, Iacovacci, Michele, N., Iucci, H. Y., Jai, F. M., Kong, H. H., Kuang, B., Li, Z. Q., Liu, H., Lu, G., Mancarella, S. M., Mari, G., Marsella, D., Martello, D. M., Mei, X. R., Meng, L., Milano, J., Mu, M., Panareo, C., Pellizzoni, Z. R., Peng, C., Pinto, P., Pistilli, E., Reali, R., Santonico, C., Sbarra, P. R., Shen, C., Stanescu, J., Su, L. R., Sun, S. C., Sun, A., Surdo, Y. H., Tan, S., Vernetto, C. R., Wang, H., Wang, H. Y., Wang, Y. N., Wei, H. T., Yang, Q. K., Yao, X. D., Yue, A. F., Yuan, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhang, Q. Q., Zhu, Piazzoli, B. D., Vincenzi, M. D., Girolamo, T. D., Sciascio, G. D., Mancarella, Giovanni, Pellizzoni, C., THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, B., Bartoli, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, S., Catalanotti, P., Celio, N., Cheng, G., Cusumano, B. Z., Dai, G., DALI STAITI, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, Haibing, Hu, Hongbo, Hu, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, A., Mangano, Mari, Stefano Maria, S., Mastroianni, L., Nicastro, C. C., Ning, L., Perrone, C., Pino, E., Rossi, L., Saggese, P., Salvini, X. D., Sheng, F., Shi, P., Vallania, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, Q. Y., Yang, X. C., Yang, M., Zha, L., Zhang, P., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, Bacci, C, Bao, Kz, Barone, F, Bartoli, B, Bernardini, P, Calloni, E, Cao, By, Cardarelli, R, Catalanotti, S, Cavaliere, A, Cavaliere, S, Cesaroni, F, Creti, P, Piazzoli, Bd, De Vincenzi, M, Di Girolamo, T, Di Sciascio, G, Feng, Zy, Fu, Y, Gao, Xy, Geng, Qx, Guo, Hw, He, Hh, He, M, Huang, Q, Iacovacci, M, Iucci, N, Jai, Hy, Kong, Fm, Kuang, Hh, Li, B, Li, Jy, Liu, Zq, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mei, Dm, Meng, Xr, Milano, L, Mu, J, Panareo, M, Pellizzoni, C, Peng, Zr, Pinto, C, Pistilli, P, Reali, E, Santonico, R, Sbarra, C, Shen, Pr, Stanescu, C, Su, J, Sun, Lr, Sun, Sc, Surdo, A, Tan, Yh, Vernetto, S, Wang, Cr, Wang, H, Wang, Hy, Wei, Yn, Yang, Ht, Yao, Qk, Yu, Gc, Yue, Xd, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Nj, Zhang, Tj, Zhang, Xy, and Zhu, Qq
- Subjects
Physics ,gamma ray detector ,Nuclear and High Energy Physics ,Shower ,Air shower ,Altitude ,Meteorology ,Data analysis ,Gamma Ray Bursts ,Effects of high altitude on humans ,Instrumentation - Abstract
An RPC carpet covering similar to 10(4) m(2) (ARGO-YBJ experiment) will be installed in the YangBaJing Laboratory (Tibet, People's Republic of China) at an altitude of 4300 m a.s.l. A test-module of similar to 50 m(2) has been put in operation in this laboratory and about 10(6) air shower events have been collected. The RPC performance at high altitude and the carpet capability of reconstructing the shower features are presented. (C) 2000 Elsevier Science B.V. All rights reserved.
- Published
- 2000
49. New Limit on the Lepton-Flavor-Violating Decayμ+→e+γ
- Author
-
N. Kravchuk, D.N. Grigoriev, F. Tenchini, J. Adam, G. Piredda, A. de Bari, Tomiyoshi Haruyama, D. Zanello, S. Yamada, Luca Galli, E. Baracchini, B.I. Khazin, R. Pazzi, Satoshi Mihara, D. Mzavia, Y. Nishimura, Angela Papa, C. Voena, S. Suzuki, M. Hildebrandt, Donato Nicolo, M. De Gerone, J. Egger, Flavio Gatti, Yu.V. Yudin, Stefan Ritt, F.V. Ignatov, A. Maki, Yasunori Fujii, G. Gallucci, Ryu Sawada, A. S. Korenchenko, P.R. Kettle, F. Renga, A.S. Popov, Akira Yamamoto, R. Valle, Fabrizio Cei, Hajime Nishiguchi, Marco Grassi, G. Boca, C. Bemporad, P. W. Cattaneo, M. Rossella, T. Iwamoto, K. Fratini, C. Topchyan, M. Panareo, Wataru Ootani, Y. Hisamatsu, W. R. Molzon, Giovanni Signorelli, C. Cerri, B. Golden, F. Sergiampietri, Satoru Yamashita, G. Cavoto, Tadayoshi Doke, A. M. Baldini, F. Xiao, Takehiko Mori, Yusuke Uchiyama, S. Dussoni, H. Natori, X. Bai, and O. Kiselev
- Subjects
Physics ,Particle physics ,Muon ,Likelihood analysis ,Branching fraction ,General Physics and Astronomy ,High Energy Physics::Experiment ,Limit (mathematics) ,Photon energy ,Lepton ,Positron energy - Abstract
We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton-flavor-violating decay ${\ensuremath{\mu}}^{+}\ensuremath{\rightarrow}{e}^{+}\ensuremath{\gamma}$. The likelihood analysis of the combined data sample, which corresponds to a total of $1.8\ifmmode\times\else\texttimes\fi{}{10}^{14}$ muon decays, gives a 90% C.L. upper limit of $2.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}12}$ on the branching ratio of the ${\ensuremath{\mu}}^{+}\ensuremath{\rightarrow}{e}^{+}\ensuremath{\gamma}$ decay, constituting the most stringent limit on the existence of this decay to date.
- Published
- 2011
50. Observation of the February 2011 Forbush decrease by the EEE telescopes
- Author
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P. La Rocca, D. De Gruttola, Fabrizio Giulio Luca Pilo, F. L. Fabbri, R. Zouyevski, C. Avanzini, M. Selvi, Marcello Abbrescia, E. Bossini, R. Moro, M. Taiuti, A. Zichichi, Eugenio Scapparone, A. Chiavassa, M. Garbini, F. Coccetti, F. Romano, E. Bressan, Despina Hatzifotiadou, M. Massai, E. Siddi, S. Serci, G. Gemme, C. Gustavino, L. Cifarelli, Riccardo Paoletti, Sandro Squarcia, S. Li, M. Panareo, K. Doroud, Corrado Cicalo, M. C. S. Williams, G. Piragino, Francesco Riggi, E. Coccia, A. Maggiora, A. Regano, S. De Pasquale, A. Di Giovanni, S. Miozzi, G. Bencivenni, G. Spandre, M. D'Incecco, L. Perasso, Gabriella Sartorelli, I. Gnesi, L. Votano, S. Aiola, R. Baldini Ferroli, F. Librizzi, F. Tosello, M. Dreucci, A. Scribano, H. Menghetti, V. Frolov, R. Antolini, M., Abbrescia, S., Aiola, R., Antolini, C., Avanzini, R., Baldini Ferroli, G., Bencivenni, E., Bossini, E., Bressan, A., Chiavassa, C., Cicalo, L., Cifarelli, F., Coccetti, E., Coccia, D., De Gruttola, S., De Pasquale, A., Di Giovanni, M., D'Incecco, K., Doroud, M., Dreucci, F. L., Fabbri, V., Frolov, M., Garbini, G., Gemme, I., Gnesi, C., Gustavino, D., Hatzifotiadou, P., La Rocca, S., Li, F., Librizzi, A., Maggiora, M., Massai, H., Menghetti, S., Miozzi, R., Moro, Panareo, Marco, R., Paoletti, L., Perasso, F., Pilo, G., Piragino, A., Regano, F., Riggi, F., Romano, G., Sartorelli, E., Scapparone, A., Scribano, M., Selvi, S., Serci, E., Siddi, G., Spandre, S., Squarcia, M., Taiuti, F., Tosello, L., Votano, M. C. S., William, A., Zichichi, R., Zouyevski, Abbrescia M., Aiola S., Antolini R., Avanzini C., Baldini Ferroli R., Bencivenni G., Bossini E., Bressan E., Chiavassa A., Cicalo C., Cifarelli L., Coccetti F., Coccia E., De Gruttola D., De Pasquale S., Di Giovanni A., D'Incecco M., Doroud K., Dreucci M., Fabbri F.L., Frolov V., Garbini M., Gemme G., Gnesi I., Gustavino C., Hatzifotiadou D., La Rocca P., Li S., Librizzi F., Maggiora A., Massai M., Menghetti H., Miozzi S., Moro R., Panareo M., Paoletti R., Perasso L., Pilo F., Piragino G., Regano A., Riggi F., Romano F., Sartorelli G, Scapparone E., Scribano A., Selvi M., Serci S., Siddi E., Spandre G., Squarcia S., Taiuti M., Tosello F., Votano L., Williams M.C.S., Zichichi A., and Zouyevski R.
- Subjects
Physics ,Large Hadron Collider ,Muon ,Neutron monitor ,Solar flare ,Physics::Instrumentation and Detectors ,Astrophysics::High Energy Astrophysical Phenomena ,General Physics and Astronomy ,Astronomy ,muon telescope ,COSMIC RAYS ,solar flare ,EEE Project ,Physics::Space Physics ,Coronal mass ejection ,High Energy Physics::Experiment ,Forbush decrease ,MUON TELESCOPES ,Nuclear Experiment ,Counting rate ,FORBUSH - Abstract
The Forbush decrease following the large X2 solar flare on mid-February 2011 has been observed by the muon telescopes of the EEE Project, which are located in several Italian sites and at CERN. Data from two different telescopes of the EEE network have been analyzed and compared to those measured by neutron monitor stations. The variation of the muon counting rate during the Forbush decrease was also extracted for different intervals of the azimuthal angle of the incoming muons.
- Published
- 2011
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