Search for particles with unexpected mass and charge in Z decays

Buskulic, D.; Decamp, D.; Goy, C.; Lees, J.; Minard, M.; Mours, B.; Pietrzyk, B.; Alemany, R.; Ariztizabal, F.; Comas, P.; Crespo, J.; Delfino, M.; Fernandez, E.; Fernandezbosman, M.; Gaitan, V.; Garrido, L.; Mattison, T.; Pacheco, A.; Padilla, C.; Pascual, A.; Creanza, D.; Depalma, M.; Farilla, A.; Iaselli, G.; Maggi, G.; Maggi, M.; Natali, S.; Nuzzo, S.; Quattromini, M.; Ranieri, A.; Raso, G.; Romano, F.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Zito, G.; Chai, Y.; Hu, H.; Huang, D.; Huang, X.; Lin, J.; Wang, T.; Xie, Y.; Xu, D.; Xu, R.; Zhang, J.; Zhang, L.; Zhao, W.; Bauerdick, L.; Blucher, E.; Bonvicini, G.; Boudreau, J.; Casper, D.; Drevermann, H.; Forty, R.; Ganis, G.; Gay, C.; Hagelberg, R.; Harvey, J.; Haywood, S.; Hilgart, J.; Jacobsen, R.; Jost, B.; Knobloch, J.; Lehraus, I.; Lohse, T.; Lusiani, A.; Martinez, M.; Mato, P.; Meinhard, H.; Minten, A.; Miotto, A.; Miquel, R.; Moser, H.; Palazzi, P.; Perlas, J.; Pusztaszeri, J.; Ranjard, F.; Redlinger, G.; Rolandi, L.; Rothberg, J.; Ruan, T.; Saich, M.; Schlatter, D.; Schmelling, M.; Sefkow, F.; Tejessy, W.; Wachsmuth, H.; Wiedenmann, W.; Wildish, T.; Witzeling, W.; Wotschack, J.; Ajaltouni, Z.; Badaud, F.; Bardadinotwinowska, M.; Elfellous, R.; Falvard, A.; Gay, P.; Guicheney, C.; Henrard, P.; Jousset, J.; Michel, B.; Montret, J.; Pallin, D.; Perret, P.; Podlyski, F.; Proriol, J.; Prulhiere, F.; Saadi, F.; Fearnley, T.; Hansen, J.; Hansen, J.; Hansen, P.; Mollerud, R.; Nilsson, B.; Efthymiopoulos, I.; Kyriakis, A.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Badier, J.; Blondel, A.; Bonneaud, G.; Brient, J.; Fouque, G.; Orteu, S.; Rouge, A.; Rumpf, M.; Tanaka, R.; Verderi, M.; Videau, H.; Candlin, D.; Parsons, M.; Veitch, E.; Moneta, L.; Parrini, G.; Corden, M.; Georgiopoulos, C.; Ikeda, M.; Lannutti, J.; Levinthal, D.; Mermikides, M.; Sawyer, L.; Wasserbaech, S.; Antonelli, A.; Baldini, R.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Cerutti, F.; Chiarella, V.; Dettorrepiazzoli, B.; Felici, G.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, G.; Passalacqua, L.; Pepealtarelli, M.; Picchi, P.; Colrain, P.; Tenhave, I.; Lynch, J.; Maitland, W.; Morton, W.; Raine, C.; Reeves, P.; Scarr, J.; Smith, K.; Smith, M.; Thompson, A.; Turnbull, R.; Brandl, B.; Braun, O.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E.; Maumary, Y.; Putzer, A.; Rensch, B.; Stahl, A.; Tittel, K.; Wunsch, M.; Belk, A.; Beuselinck, R.; Binnie, D.; Cameron, W.; Cattaneo, M.; Colling, D.; Dornan, P.; Dugeay, S.; Greene, A.; Hassard, J.; Lieske, N.; Nash, J.; Payne, D.; Phillips, M.; Sedgbeer, J.; Tomalin, I.; Wright, A.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bowdery, C.; Brodbeck, T.; Finch, A.; Foster, F.; Hughes, G.; Jackson, D.; Keemer, N.; Nuttall, M.; Patel, A.; Sloan, T.; Snow, S.; Whelan, E.; Kleinknecht, K.; Raab, J.; Renk, B.; Sander, H.; Schmidt, H.; Steeg, F.; Walther, S.; Wanke, R.; Wolf, B.; Aubert, J.; Bencheikh, A.; Benchouk, C.; Bonissent, A.; Carr, J.; Coyle, P.; Drinkard, J.; Etienne, F.; Nicod, D.; Papalexiou, S.; Payre, P.; Roos, L.; Rousseau, D.; Schwemling, P.; Talby, M.; Adlung, S.; Assmann, R.; Bauer, C.; Blum, W.; Brown, D.; Cattaneo, P.; Dehning, B.; Dietl, H.; Dydak, F.; Frank, M.; Halley, A.; Lauber, J.; Lutjens, G.; Lutz, G.; Manner, W.; Richter, R.; Rotscheidt, H.; Schroder, J.; Schwarz, A.; Settles, R.; Seywerd, H.; Stierlin, U.; Stiegler, U.; Stdenis, R.; Wolf, G.; Boucrot, J.; Callot, O.; Cordier, A.; Davier, M.; Duflot, L.; Grivaz, J.; Heusse, P.; Jaffe, D.; Janot, P.; Kim, D.; Lediberder, F.; Lefrancois, J.; Lutz, A.; Schune, M.; Veillet, J.; Videau, I.; Zhang, Z.; Abbaneo, D.; Bagliesi, G.; Batignani, G.; Bosisio, L.; Bottigli, U.; Bozzi, C.; Calderini, G.; Carpinelli, M.; Ciocci, M.; Dellorso, R.; Ferrante, I.; Fidecaro, F.; Foa, L.; Focardi, E.; Forti, F.; Giassi, A.; Giorgi, M.; Gregorio, A.; Ligabue, F.; Mannelli, E.; Marrocchesi, P.; Messineo, A.; Palla, F.; Rizzo, G.; Sanguinetti, G.; Spagnolo, P.; Steinberger, J.; Tenchini, R.; Tonelli, G.; Triggiani, G.; Vannini, C.; Venturi, A.; Verdini, P.; Walsh, J.; Betteridge, A.; Carter, J.; Green, M.; March, P.; Mir, L.; Medcalf, T.; Quazi, I.; Strong, J.; West, L.; Botterill, D.; Clifft, R.; Edgecock, T.; Edwards, M.; Fisher, S.; Jones, T.; Norton, P.; Salmon, D.; Thompson, J.; Blochdevaux, B.; Colas, P.; Duarte, H.; Kozanecki, W.; Lancon, E.; Lemaire, M.; Locci, E.; Perez, P.; Perrier, F.; Rander, J.; Renardy, J.; Rosowsky, A.; Roussarie, A.; Schuller, J.; Schwindling, J.; Mohand, D.; Vallage, B.; Johnson, R.; Litke, A.; Taylor, G.; Wear, J.; Ashman, J.; Babbage, W.; Booth, C.; Buttar, C.; Carney, R.; Cartwright, S.; Combley, F.; Hatfield, F.; Thompson, L.; Barberio, E.; Bohrer, A.; Brandt, S.; Cowan, G.; Grupen, C.; Lutters, G.; Rivera, F.; Schafer, U.; Smolik, L.; Dellamarina, R.; Giannini, G.; Gobbo, B.; Ragusa, F.; Bellantoni, L.; Chen, W.; Cinabro, D.; Conway, J.; Cowen, D.; Feng, Z.; Ferguson, D.; Gao, Y.; Grahl, J.; Harton, J.; Jared, R.; Leclaire, B.; Lishka, C.; Pan, Y.; Pater, J.; Saadi, Y.; Sharma, V.; Schmitt, M.; Shi, Z.; Walsh, A.; Weber, F.; Wu, S.; Wu, X.; Zheng, M.; Zobernig, G.

doi:10.1016/0370-2693(93)90066-Q

During 1989 and 1990 over 180 000 hadronic and leptonic events, corresponding to 8 pb-1 of luminosity, were collected by the ALEPH detector in a scan of the Z peak at the e+e- collider LEP. This letter reports the results of a search in these data for particles with unexpected mass and charge by measurement of the ionization energy loss of charged tracks in the ALEPH TPC central tracking detector. The mass limits for the pair production of fractionally charged particles and of heavy, long lived charged particles are extended to 43 GeV/c2 at 90% confidence level. If single production of a heavy particle is considered, the mass limit is extended to more than 70 GeV/c2.

Search for particles with unexpected mass and charge in Z decays / D. Buskulic, D. Decamp, C. Goy, J. Lees, M. Minard, B. Mours, B. Pietrzyk, R. Alemany, F. Ariztizabal, P. Comas, J. Crespo, M. Delfino, E. Fernandez, M. Fernandezbosman, V. Gaitan, L. Garrido, T. Mattison, A. Pacheco, C. Padilla, A. Pascual, D. Creanza, M. Depalma, A. Farilla, G. Iaselli, G. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chai, H. Hu, D. Huang, X. Huang, J. Lin, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, L. Zhang, W. Zhao, L. Bauerdick, E. Blucher, G. Bonvicini, J. Boudreau, D. Casper, H. Drevermann, R. Forty, G. Ganis, C. Gay, R. Hagelberg, J. Harvey, S. Haywood, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, T. Lohse, A. Lusiani, M. Martinez, P. Mato, H. Meinhard, A. Minten, A. Miotto, R. Miquel, H. Moser, P. Palazzi, J. Perlas, J. Pusztaszeri, F. Ranjard, G. Redlinger, L. Rolandi, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, H. Wachsmuth, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, F. Badaud, M. Bardadinotwinowska, R. Elfellous, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, F. Prulhiere, F. Saadi, T. Fearnley, J. Hansen, J. Hansen, P. Hansen, R. Mollerud, B. Nilsson, I. Efthymiopoulos, A. Kyriakis, E. Simopoulou, A. Vayaki, K. Zachariadou, J. Badier, A. Blondel, G. Bonneaud, J. Brient, G. Fouque, S. Orteu, A. Rouge, M. Rumpf, R. Tanaka, M. Verderi, H. Videau, D. Candlin, M. Parsons, E. Veitch, L. Moneta, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, S. Wasserbaech, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, F. Cerutti, V. Chiarella, B. Dettorrepiazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, L. Passalacqua, M. Pepealtarelli, P. Picchi, P. Colrain, I. Tenhave, J. Lynch, W. Maitland, W. Morton, C. Raine, P. Reeves, J. Scarr, K. Smith, M. Smith, A. Thompson, R. Turnbull, B. Brandl, O. Braun, C. Geweniger, P. Hanke, V. Hepp, E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A. Belk, R. Beuselinck, D. Binnie, W. Cameron, M. Cattaneo, D. Colling, P. Dornan, S. Dugeay, A. Greene, J. Hassard, N. Lieske, J. Nash, D. Payne, M. Phillips, J. Sedgbeer, I. Tomalin, A. Wright, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, C. Bowdery, T. Brodbeck, A. Finch, F. Foster, G. Hughes, D. Jackson, N. Keemer, M. Nuttall, A. Patel, T. Sloan, S. Snow, E. Whelan, K. Kleinknecht, J. Raab, B. Renk, H. Sander, H. Schmidt, F. Steeg, S. Walther, R. Wanke, B. Wolf, J. Aubert, A. Bencheikh, C. Benchouk, A. Bonissent, J. Carr, P. Coyle, J. Drinkard, F. Etienne, D. Nicod, S. Papalexiou, P. Payre, L. Roos, D. Rousseau, P. Schwemling, M. Talby, S. Adlung, R. Assmann, C. Bauer, W. Blum, D. Brown, P. Cattaneo, B. Dehning, H. Dietl, F. Dydak, M. Frank, A. Halley, J. Lauber, G. Lutjens, G. Lutz, W. Manner, R. Richter, H. Rotscheidt, J. Schroder, A. Schwarz, R. Settles, H. Seywerd, U. Stierlin, U. Stiegler, R. Stdenis, G. Wolf, J. Boucrot, O. Callot, A. Cordier, M. Davier, L. Duflot, J. Grivaz, P. Heusse, D. Jaffe, P. Janot, D. Kim, F. Lediberder, J. Lefrancois, A. Lutz, M. Schune, J. Veillet, I. Videau, Z. Zhang, D. Abbaneo, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bozzi, G. Calderini, M. Carpinelli, M. Ciocci, R. Dellorso, I. Ferrante, F. Fidecaro, L. Foa, E. Focardi, F. Forti, A. Giassi, M. Giorgi, A. Gregorio, F. Ligabue, E. Mannelli, P. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini, A. Venturi, P. Verdini, J. Walsh, A. Betteridge, J. Carter, M. Green, P. March, L. Mir, T. Medcalf, I. Quazi, J. Strong, L. West, D. Botterill, R. Clifft, T. Edgecock, M. Edwards, S. Fisher, T. Jones, P. Norton, D. Salmon, J. Thompson, B. Blochdevaux, P. Colas, H. Duarte, W. Kozanecki, E. Lancon, M. Lemaire, E. Locci, P. Perez, F. Perrier, J. Rander, J. Renardy, A. Rosowsky, A. Roussarie, J. Schuller, J. Schwindling, D. Mohand, B. Vallage, R. Johnson, A. Litke, G. Taylor, J. Wear, J. Ashman, W. Babbage, C. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, F. Hatfield, L. Thompson, E. Barberio, A. Bohrer, S. Brandt, G. Cowan, C. Grupen, G. Lutters, F. Rivera, U. Schafer, L. Smolik, R. Dellamarina, G. Giannini, B. Gobbo, F. Ragusa, L. Bellantoni, W. Chen, D. Cinabro, J. Conway, D. Cowen, Z. Feng, D. Ferguson, Y. Gao, J. Grahl, J. Harton, R. Jared, B. Leclaire, C. Lishka, Y. Pan, J. Pater, Y. Saadi, V. Sharma, M. Schmitt, Z. Shi, A. Walsh, F. Weber, S. Wu, X. Wu, M. Zheng, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 303:1/2(1993), pp. 198-208. [10.1016/0370-2693(93)90066-Q]

Search for particles with unexpected mass and charge in Z decays

D. Buskulic;D. Decamp;C. Goy;J. Lees;M. Minard;B. Mours;B. Pietrzyk;R. Alemany;F. Ariztizabal;P. Comas;J. Crespo;M. Delfino;E. Fernandez;M. Fernandezbosman;V. Gaitan;L. Garrido;T. Mattison;A. Pacheco;C. Padilla;A. Pascual;D. Creanza;M. Depalma;A. Farilla;G. Iaselli;G. Maggi;M. Maggi;S. Natali;S. Nuzzo;M. Quattromini;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;Y. Chai;H. Hu;D. Huang;X. Huang;J. Lin;T. Wang;Y. Xie;D. Xu;R. Xu;J. Zhang;L. Zhang;W. Zhao;L. Bauerdick;E. Blucher;G. Bonvicini;J. Boudreau;D. Casper;H. Drevermann;R. Forty;G. Ganis;C. Gay;R. Hagelberg;J. Harvey;S. Haywood;J. Hilgart;R. Jacobsen;B. Jost;J. Knobloch;I. Lehraus;T. Lohse;A. Lusiani;M. Martinez;P. Mato;H. Meinhard;A. Minten;A. Miotto;R. Miquel;H. Moser;P. Palazzi;J. Perlas;J. Pusztaszeri;F. Ranjard;G. Redlinger;L. Rolandi;J. Rothberg;T. Ruan;M. Saich;D. Schlatter;M. Schmelling;F. Sefkow;W. Tejessy;H. Wachsmuth;W. Wiedenmann;T. Wildish;W. Witzeling;J. Wotschack;Z. Ajaltouni;F. Badaud;M. Bardadinotwinowska;R. Elfellous;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;J. Montret;D. Pallin;P. Perret;F. Podlyski;J. Proriol;F. Prulhiere;F. Saadi;T. Fearnley;J. Hansen;J. Hansen;P. Hansen;R. Mollerud;B. Nilsson;I. Efthymiopoulos;A. Kyriakis;E. Simopoulou;A. Vayaki;K. Zachariadou;J. Badier;A. Blondel;G. Bonneaud;J. Brient;G. Fouque;S. Orteu;A. Rouge;M. Rumpf;R. Tanaka;M. Verderi;H. Videau;D. Candlin;M. Parsons;E. Veitch;L. Moneta;G. Parrini;M. Corden;C. Georgiopoulos;M. Ikeda;J. Lannutti;D. Levinthal;M. Mermikides;L. Sawyer;S. Wasserbaech;A. Antonelli;R. Baldini;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;F. Cerutti;V. Chiarella;B. Dettorrepiazzoli;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G. Murtas;L. Passalacqua;M. Pepealtarelli;P. Picchi;P. Colrain;I. Tenhave;J. Lynch;W. Maitland;W. Morton;C. Raine;P. Reeves;J. Scarr;K. Smith;M. Smith;A. Thompson;R. Turnbull;B. Brandl;O. Braun;C. Geweniger;P. Hanke;V. Hepp;E. Kluge;Y. Maumary;A. Putzer;B. Rensch;A. Stahl;K. Tittel;M. Wunsch;A. Belk;R. Beuselinck;D. Binnie;W. Cameron;M. Cattaneo;D. Colling;P. Dornan;S. Dugeay;A. Greene;J. Hassard;N. Lieske;J. Nash;D. Payne;M. Phillips;J. Sedgbeer;I. Tomalin;A. Wright;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;C. Bowdery;T. Brodbeck;A. Finch;F. Foster;G. Hughes;D. Jackson;N. Keemer;M. Nuttall;A. Patel;T. Sloan;S. Snow;E. Whelan;K. Kleinknecht;J. Raab;B. Renk;H. Sander;H. Schmidt;F. Steeg;S. Walther;R. Wanke;B. Wolf;J. Aubert;A. Bencheikh;C. Benchouk;A. Bonissent;J. Carr;P. Coyle;J. Drinkard;F. Etienne;D. Nicod;S. Papalexiou;P. Payre;L. Roos;D. Rousseau;P. Schwemling;M. Talby;S. Adlung;R. Assmann;C. Bauer;W. Blum;D. Brown;P. Cattaneo;B. Dehning;H. Dietl;F. Dydak;M. Frank;A. Halley;J. Lauber;G. Lutjens;G. Lutz;W. Manner;R. Richter;H. Rotscheidt;J. Schroder;A. Schwarz;R. Settles;H. Seywerd;U. Stierlin;U. Stiegler;R. Stdenis;G. Wolf;J. Boucrot;O. Callot;A. Cordier;M. Davier;L. Duflot;J. Grivaz;P. Heusse;D. Jaffe;P. Janot;D. Kim;F. Lediberder;J. Lefrancois;A. Lutz;M. Schune;J. Veillet;I. Videau;Z. Zhang;D. Abbaneo;G. Bagliesi;G. Batignani;L. Bosisio;U. Bottigli;C. Bozzi;G. Calderini;M. Carpinelli;M. Ciocci;R. Dellorso;I. Ferrante;F. Fidecaro;L. Foa;E. Focardi;F. Forti;A. Giassi;M. Giorgi;A. Gregorio;F. Ligabue;E. Mannelli;P. Marrocchesi;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;P. Spagnolo;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;C. Vannini;A. Venturi;P. Verdini;J. Walsh;A. Betteridge;J. Carter;M. Green;P. March;L. Mir;T. Medcalf;I. Quazi;J. Strong;L. West;D. Botterill;R. Clifft;T. Edgecock;M. Edwards;S. Fisher;T. Jones;P. Norton;D. Salmon;J. Thompson;B. Blochdevaux;P. Colas;H. Duarte;W. Kozanecki;E. Lancon;M. Lemaire;E. Locci;P. Perez;F. Perrier;J. Rander;J. Renardy;A. Rosowsky;A. Roussarie;J. Schuller;J. Schwindling;D. Mohand;B. Vallage;R. Johnson;A. Litke;G. Taylor;J. Wear;J. Ashman;W. Babbage;C. Booth;C. Buttar;R. Carney;S. Cartwright;F. Combley;F. Hatfield;L. Thompson;E. Barberio;A. Bohrer;S. Brandt;G. Cowan;C. Grupen;G. Lutters;F. Rivera;U. Schafer;L. Smolik;R. Dellamarina;G. Giannini;B. Gobbo;F. Ragusa;L. Bellantoni;W. Chen;D. Cinabro;J. Conway;D. Cowen;Z. Feng;D. Ferguson;Y. Gao;J. Grahl;J. Harton;R. Jared;B. Leclaire;C. Lishka;Y. Pan;J. Pater;Y. Saadi;V. Sharma;M. Schmitt;Z. Shi;A. Walsh;F. Weber;S. Wu;X. Wu;M. Zheng;G. Zobernig

1993

Abstract

During 1989 and 1990 over 180 000 hadronic and leptonic events, corresponding to 8 pb-1 of luminosity, were collected by the ALEPH detector in a scan of the Z peak at the e+e- collider LEP. This letter reports the results of a search in these data for particles with unexpected mass and charge by measurement of the ionization energy loss of charged tracks in the ALEPH TPC central tracking detector. The mass limits for the pair production of fractionally charged particles and of heavy, long lived charged particles are extended to 43 GeV/c2 at 90% confidence level. If single production of a heavy particle is considered, the mass limit is extended to more than 70 GeV/c2.

Scheda breve

Scheda completa

Scheda completa (DC)

	Settori scientifico-disciplinari dell'articolo
	
			Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
		
	Data di pubblicazione
	
			1993
		
	Rivista in ANCE
	
			PHYSICS LETTERS. SECTION B
		
	DOI
	
			https://dx.doi.org/10.1016/0370-2693(93)90066-Q
		
	Tipologia
	
			Article (author)
		
	Appare nelle tipologie:
	
			01 - Articolo su periodico

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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/176333

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