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A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons has been made at center-of-mass energies root s = 161 GeV and root s = 172 GeV with the L3 detector at LEP. No evidence for their existence was found. We exclude unstable neutral leptons of Dirac (Majorana) type for masses below 78.0 (66.7), 78.0 (66.7) and 72.2 (58.2) GeV, if the heavy neutrino couples to the electron, muon or tau family, respectively. We exclude unstable charged heavy leptons for masses below 81.0 GeV for a wide mass range of the associated neutral heavy lepton. The production of stable charged heavy leptons with a mass less than 84.2 GeV is also excluded. If the unstable charged heavy lepton decays via mixing into a massless neutrino, we exclude masses below 78.7 GeV. (C) 1997 Elsevier Science B.V.

Search for heavy neutral and charged leptons in e(+)e(-) annihilation at root s=161 and root s=172 GeV / Acciarri, M; Adriani, O; Aguilarbenitez, M; Ahlen, S; Alcaraz, J; Alemanni, G; Allaby, J; Aloisio, A; Alverson, G; Alviggi, Mg; Ambrosi, G; Anderhub, H; Andreev, Vp; Angelescu, T; Anselmo, F; Arefiev, A; Azemoon, T; Aziz, T; Bagnaia, Paolo; Baksay, L; Banerjee, S; Banerjee, S; Banicz, K; Barczyk, A; Barillere, R; Barone, Luciano Maria; Bartalini, P; Baschirotto, A; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, Bl; Bhattacharya, S; Biasini, M; Biland, A; Bilei, Gm; Blaising, Jj; Blyth, Sc; Bobbink, Gj; Bock, R; Bohm, A; Boldizsar, L; Borgia, B; Bourilkov, D; Bourquin, M; Braccini, S; Branson, Jg; Brigljevic, V; Brock, Ic; Buffini, A; Buijs, A; Burger, Jd; Burger, Wj; Busenitz, J; Button, A; Cai, Xd; Campanelli, M; Capell, M; Romeo, Gc; Carlino, G; Cartacci, Am; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Cesaroni, F; Chamizo, M; Chang, Yh; Chaturvedi, Uk; Chekanov, Sv; Chemarin, M; Chen, A; Chen, G; Chen, Gm; Chen, Hf; Chen, Hs; Chereau, X; Chiefari, G; Chien, Cy; Cifarelli, L; Cindolo, F; Civinini, C; Clare, I; Clare, R; Cohn, Ho; Coignet, G; Colijn, Ap; Colino, N; Commichau, V; Costantini, S; Cotorobai, F; Delacruz, B; Csilling, A; Dai, Ts; Dalessandro, R; Deasmundis, R; Degre, A; Deiters, K; Dellavolpe, D; Denes, P; Denotaristefani, F; Dibitonto, D; Diemoz, M; Vandierendonck, D; Dilodovico, F; Dionisi, C; Dittmar, M; Dominguez, A; Doria, A; Dova, Mt; Duchesneau, D; Duinker, P; Duran, I; Dutta, S; Easo, S; Efremenko, Y; Elmamouni, H; Engler, A; Eppling, Fj; Erne, Fc; Ernenwein, Jp; Extermann, P; Fabre, M; Faccini, R; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Fenyi, B; Ferguson, T; Ferroni, Fernando; Fesefeldt, H; Fiandrini, E; Field, Jh; Filthaut, F; Fisher, Ph; Fisk, I; Forconi, G; Fredj, L; Freudenreich, K; Furetta, C; Galaktionov, Y; Ganguli, Sn; Garciaabia, P; Gau, Ss; Gentile, Simonetta; Gheordanescu, N; Giagu, Stefano; Goldfarb, S; Goldstein, J; Gong, Zf; Gougas, A; Gratta, G; Gruenewald, Mw; Gupta, Vk; Gurtu, A; Gutay, Lj; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Herve, A; Vanhoek, Wc; Hofer, H; Hong, Sj; Hoorani, H; Hou, Sr; Hu, G; Innocente, V; Jenkes, K; Jin, Bn; Jones, Lw; Dejong, P; Josamutuberria, I; Kasser, A; Khan, Ra; Kamrad, D; Kamyshkov, Y; Kapustinsky, Js; Karyotakis, Y; Kaur, M; Kienzlefocacci, Mn; Kim, D; Kim, Dh; Kim, Jk; Kim, Sc; Kim, Yg; Kinnison, Ww; Kirkby, A; Kirkby, D; Kirkby, J; Kiss, D; Kittel, W; Klimentov, A; Konig, Ac; Kopp, A; Korolko, I; Koutsenko, V; Kraemer, Rw; Krenz, W; Kunin, A; Deguevara, Pl; Laktineh, I; Landi, G; Lapoint, C; Lassilaperini, K; Laurikainen, P; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Lecoultre, P; Legoff, Jm; Leiste, R; Leonardi, E; Levtchenko, P; Li, C; Lin, Ch; Lin, Wt; Linde, Fl; Lista, L; Liu, Za; Lohmann, W; Longo, E; Lu, W; Lu, Ys; Lubelsmeyer, K; Luci, Claudio; Luckey, D; Luminari, L; Lustermann, W; Ma, Wg; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Mana, C; Mangeol, D; Mangla, S; Marchesini, P; Marin, A; Martin, Jp; Marzano, F; Massaro, Ggg; Mcnally, D; Mcneil, Rr; Mele, S; Merola, L; Meschini, M; Metzger, Wj; Vondermey, M; Mi, Y; Mihul, A; Vanmil, Ajw; Mirabelli, G; Mnich, J; Molnar, P; Monteleoni, B; Moore, R; Morganti, S; Moulik, T; Mount, R; Muller, S; Muheim, F; Muijs, Ajm; Nahn, S; Napolitano, M; Nessitedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yd; Opitz, H; Organtini, Giovanni; Ostonen, R; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, Hk; Park, Ih; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, F; Peach, D; Pei, Yj; Pensotti, S; Perretgallix, D; Petersen, B; Petrak, S; Pevsner, A; Piccolo, D; Pieri, M; Pinto, Jc; Piroue, Pa; Pistolesi, E; Plyaskin, V; Pohl, M; Pojidaev, V; Postema, H; Produit, N; Prokofiev, D; Rahalcallot, G; Raja, N; Rancoita, Pg; Rattaggi, M; Raven, G; Razis, P; Read, K; Ren, D; Rescigno, M; Reucroft, S; Vanrhee, T; Riemann, S; Riles, K; Robohm, A; Rodin, J; Roe, Bp; Romero, L; Rosierlees, S; Rosselet, P; Vanrossum, W; Roth, S; Rubio, Ja; Ruschmeier, D; Rykaczewski, H; Salicio, J; Sanchez, E; Sanders, Mp; Sarakinos, Me; Sarkar, S; Sassowsky, M; Schafer, E; Schegelsky, V; Schmidtkaerst, S; Schmitz, D; Schmitz, P; Scholz, N; Schopper, H; Schotanus, Dj; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A; Siedenburg, T; Son, D; Sopczak, A; Smith, B; Spillantini, P; Steuer, M; Stickland, Dp; Stone, A; Stone, H; Stoyanov, B; Straessner, A; Strauch, K; Sudhakar, K; Sultanov, G; Sun, Lz; Susinno, Gf; Suter, H; Swain, Jd; Tang, Xw; Tauscher, L; Taylor, L; Ting, Scc; Ting, Sm; Tonutti, M; Tonwar, Sc; Toth, J; Tully, C; Tuchscherer, H; Tung, Kl; Uchida, Y; Ulbricht, J; Uwer, U; Valente, E; Vandewalle, Rt; Vesztergombi, G; Vetlitsky, I; Viertel, G; Vivargent, M; Volkert, R; Vogel, H; Vogt, H; Vorobiev, I; Vorobyov, Aa; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, Jc; Wang, Xl; Wang, Zm; Weber, A; Wittgenstein, F; Wu, Sx; Wynhoff, S; Xu, J; Xu, Zz; Yang, Bz; Yang, Cg; Yao, Xy; Ye, Jb; Yeh, Sc; You, Jm; Zalite, A; Zalite, Y; Zemp, P; Zeng, Y; Zhang, Z; Zhang, Zp; Zhou, B; Zhu, Gy; Zhu, Ry; Zichichi, A; Ziegler, F.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 412:(1997), pp. 189-200. [10.1016/S0370-2693(97)01074-5]

Search for heavy neutral and charged leptons in e(+)e(-) annihilation at root s=161 and root s=172 GeV

BAGNAIA, Paolo;BARONE, Luciano Maria;FERRONI, Fernando;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI, Giovanni;
1997

Abstract

A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons has been made at center-of-mass energies root s = 161 GeV and root s = 172 GeV with the L3 detector at LEP. No evidence for their existence was found. We exclude unstable neutral leptons of Dirac (Majorana) type for masses below 78.0 (66.7), 78.0 (66.7) and 72.2 (58.2) GeV, if the heavy neutrino couples to the electron, muon or tau family, respectively. We exclude unstable charged heavy leptons for masses below 81.0 GeV for a wide mass range of the associated neutral heavy lepton. The production of stable charged heavy leptons with a mass less than 84.2 GeV is also excluded. If the unstable charged heavy lepton decays via mixing into a massless neutrino, we exclude masses below 78.7 GeV. (C) 1997 Elsevier Science B.V.
1997
01 Pubblicazione su rivista::01a Articolo in rivista
Search for heavy neutral and charged leptons in e(+)e(-) annihilation at root s=161 and root s=172 GeV / Acciarri, M; Adriani, O; Aguilarbenitez, M; Ahlen, S; Alcaraz, J; Alemanni, G; Allaby, J; Aloisio, A; Alverson, G; Alviggi, Mg; Ambrosi, G; Anderhub, H; Andreev, Vp; Angelescu, T; Anselmo, F; Arefiev, A; Azemoon, T; Aziz, T; Bagnaia, Paolo; Baksay, L; Banerjee, S; Banerjee, S; Banicz, K; Barczyk, A; Barillere, R; Barone, Luciano Maria; Bartalini, P; Baschirotto, A; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, Bl; Bhattacharya, S; Biasini, M; Biland, A; Bilei, Gm; Blaising, Jj; Blyth, Sc; Bobbink, Gj; Bock, R; Bohm, A; Boldizsar, L; Borgia, B; Bourilkov, D; Bourquin, M; Braccini, S; Branson, Jg; Brigljevic, V; Brock, Ic; Buffini, A; Buijs, A; Burger, Jd; Burger, Wj; Busenitz, J; Button, A; Cai, Xd; Campanelli, M; Capell, M; Romeo, Gc; Carlino, G; Cartacci, Am; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Cesaroni, F; Chamizo, M; Chang, Yh; Chaturvedi, Uk; Chekanov, Sv; Chemarin, M; Chen, A; Chen, G; Chen, Gm; Chen, Hf; Chen, Hs; Chereau, X; Chiefari, G; Chien, Cy; Cifarelli, L; Cindolo, F; Civinini, C; Clare, I; Clare, R; Cohn, Ho; Coignet, G; Colijn, Ap; Colino, N; Commichau, V; Costantini, S; Cotorobai, F; Delacruz, B; Csilling, A; Dai, Ts; Dalessandro, R; Deasmundis, R; Degre, A; Deiters, K; Dellavolpe, D; Denes, P; Denotaristefani, F; Dibitonto, D; Diemoz, M; Vandierendonck, D; Dilodovico, F; Dionisi, C; Dittmar, M; Dominguez, A; Doria, A; Dova, Mt; Duchesneau, D; Duinker, P; Duran, I; Dutta, S; Easo, S; Efremenko, Y; Elmamouni, H; Engler, A; Eppling, Fj; Erne, Fc; Ernenwein, Jp; Extermann, P; Fabre, M; Faccini, R; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Fenyi, B; Ferguson, T; Ferroni, Fernando; Fesefeldt, H; Fiandrini, E; Field, Jh; Filthaut, F; Fisher, Ph; Fisk, I; Forconi, G; Fredj, L; Freudenreich, K; Furetta, C; Galaktionov, Y; Ganguli, Sn; Garciaabia, P; Gau, Ss; Gentile, Simonetta; Gheordanescu, N; Giagu, Stefano; Goldfarb, S; Goldstein, J; Gong, Zf; Gougas, A; Gratta, G; Gruenewald, Mw; Gupta, Vk; Gurtu, A; Gutay, Lj; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Herve, A; Vanhoek, Wc; Hofer, H; Hong, Sj; Hoorani, H; Hou, Sr; Hu, G; Innocente, V; Jenkes, K; Jin, Bn; Jones, Lw; Dejong, P; Josamutuberria, I; Kasser, A; Khan, Ra; Kamrad, D; Kamyshkov, Y; Kapustinsky, Js; Karyotakis, Y; Kaur, M; Kienzlefocacci, Mn; Kim, D; Kim, Dh; Kim, Jk; Kim, Sc; Kim, Yg; Kinnison, Ww; Kirkby, A; Kirkby, D; Kirkby, J; Kiss, D; Kittel, W; Klimentov, A; Konig, Ac; Kopp, A; Korolko, I; Koutsenko, V; Kraemer, Rw; Krenz, W; Kunin, A; Deguevara, Pl; Laktineh, I; Landi, G; Lapoint, C; Lassilaperini, K; Laurikainen, P; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Lecoultre, P; Legoff, Jm; Leiste, R; Leonardi, E; Levtchenko, P; Li, C; Lin, Ch; Lin, Wt; Linde, Fl; Lista, L; Liu, Za; Lohmann, W; Longo, E; Lu, W; Lu, Ys; Lubelsmeyer, K; Luci, Claudio; Luckey, D; Luminari, L; Lustermann, W; Ma, Wg; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Mana, C; Mangeol, D; Mangla, S; Marchesini, P; Marin, A; Martin, Jp; Marzano, F; Massaro, Ggg; Mcnally, D; Mcneil, Rr; Mele, S; Merola, L; Meschini, M; Metzger, Wj; Vondermey, M; Mi, Y; Mihul, A; Vanmil, Ajw; Mirabelli, G; Mnich, J; Molnar, P; Monteleoni, B; Moore, R; Morganti, S; Moulik, T; Mount, R; Muller, S; Muheim, F; Muijs, Ajm; Nahn, S; Napolitano, M; Nessitedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yd; Opitz, H; Organtini, Giovanni; Ostonen, R; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, Hk; Park, Ih; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, F; Peach, D; Pei, Yj; Pensotti, S; Perretgallix, D; Petersen, B; Petrak, S; Pevsner, A; Piccolo, D; Pieri, M; Pinto, Jc; Piroue, Pa; Pistolesi, E; Plyaskin, V; Pohl, M; Pojidaev, V; Postema, H; Produit, N; Prokofiev, D; Rahalcallot, G; Raja, N; Rancoita, Pg; Rattaggi, M; Raven, G; Razis, P; Read, K; Ren, D; Rescigno, M; Reucroft, S; Vanrhee, T; Riemann, S; Riles, K; Robohm, A; Rodin, J; Roe, Bp; Romero, L; Rosierlees, S; Rosselet, P; Vanrossum, W; Roth, S; Rubio, Ja; Ruschmeier, D; Rykaczewski, H; Salicio, J; Sanchez, E; Sanders, Mp; Sarakinos, Me; Sarkar, S; Sassowsky, M; Schafer, E; Schegelsky, V; Schmidtkaerst, S; Schmitz, D; Schmitz, P; Scholz, N; Schopper, H; Schotanus, Dj; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A; Siedenburg, T; Son, D; Sopczak, A; Smith, B; Spillantini, P; Steuer, M; Stickland, Dp; Stone, A; Stone, H; Stoyanov, B; Straessner, A; Strauch, K; Sudhakar, K; Sultanov, G; Sun, Lz; Susinno, Gf; Suter, H; Swain, Jd; Tang, Xw; Tauscher, L; Taylor, L; Ting, Scc; Ting, Sm; Tonutti, M; Tonwar, Sc; Toth, J; Tully, C; Tuchscherer, H; Tung, Kl; Uchida, Y; Ulbricht, J; Uwer, U; Valente, E; Vandewalle, Rt; Vesztergombi, G; Vetlitsky, I; Viertel, G; Vivargent, M; Volkert, R; Vogel, H; Vogt, H; Vorobiev, I; Vorobyov, Aa; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, Jc; Wang, Xl; Wang, Zm; Weber, A; Wittgenstein, F; Wu, Sx; Wynhoff, S; Xu, J; Xu, Zz; Yang, Bz; Yang, Cg; Yao, Xy; Ye, Jb; Yeh, Sc; You, Jm; Zalite, A; Zalite, Y; Zemp, P; Zeng, Y; Zhang, Z; Zhang, Zp; Zhou, B; Zhu, Gy; Zhu, Ry; Zichichi, A; Ziegler, F.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 412:(1997), pp. 189-200. [10.1016/S0370-2693(97)01074-5]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/241681
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