@article{3044847,
    title = "SEARCHES FOR HEAVY NEUTRINOS FROM Z-DECAYS",
    author = "ABREU, P and ADAM, W and ADAMI, F and ADYE, T and AKESSON, T and and ALEKSEEV, GD and ALLEN, P and ALMEHED, S and ALVSVAAG, SJ and AMALDI, U and and ANASSONTZIS, E and ANTILOGUS, P and APEL, WD and APSIMON, RJ and and ASMAN, B and ASTIER, P and AUGUSTIN, JE and AUGUSTINUS, A and BAILLON, P and and BAMBADE, P and BARAO, F and BARATE, R and BARBIELLINI, G and BARDIN, and DY and BARONCELLI, A and BARRING, O and BARTL, W and BATES, MJ and and BATTAGLIA, M and BAUBILLIER, M and BECKS, KH and BEESTON, CJ and and BEGALLI, M and BEILLIERE, P and BELOKOPYTOV, Y and BELTRAN, P and and BENEDIC, D and BENLLOCH, JM and BERGGREN, M and BERTRAND, D and BIANCHI, and F and BILENKY, MS and BILLOIR, P and BJARNE, J and BLOCH, D and BLYTH, S and and BOCCI, V and BOGOLUBOV, PN and BOLOGNESE, T and BONAPART, M and and BONESINI, M and BONIVENTO, W and BOOTH, PSL and BORATAV, M and BORGEAUD, and P and BORISOV, G and BORNER, H and BOSIO, C and BOSTJANCIC, B and and BOTNER, O and BOUQUET, B and BOURDARIOS, C and BOZZO, M and BRAIBANT, S and and BRANCHINI, P and BRAND, KD and BRENNER, RA and BRICMAN, C and BROWN, and RCA and BRUMMER, N and BRUNET, JM and BUGGE, L and BURAN, T and and BURMEISTER, H and BUYTAERT, JAMA and CACCIA, M and CALVI, M and ROZAS, and AJC and CAMPION, A and CAMPORESI, T and CANALE, V and CAO, F and CARENA, and F and CARROLL, L and CASO, C and CASTELLI, E and GIMENEZ, MVC and and CATTAI, A and CAVALLO, FR and CERRITO, L and CHAN, A and CHAPKIN, M and and CHARPENTIER, P and CHAUSSARD, L and CHECCHIA, P and CHELKOV, GA and and CHEVALIER, L and CHLIAPNIKOV, P and CHOROWICZ, V and CIRIO, R and CLARA, and MP and COLLINS, P and CONTRERAS, JL and CONTRI, R and COSME, G and and COUCHOT, F and CRAWLEY, HB and CRENNELL, D and CROSETTI, G and CROZON, M and and MAESTRO, JC and CZELLAR, S and DAGORET, S and DAHLJENSEN, E and and DALMAGNE, B and DAM, M and DAMGAARD, G and DARBO, G and DAUBIE, E and and DAUNCEY, PD and DAVENPORT, M and DAVID, P and DEFOIX, C and DELIKARIS, D and and DELORME, S and DELPIERRE, P and DEMARIA, N and DEANGELIS, A and and DEBEER, M and DEBOECK, H and DEBOER, W and DECLERCQ, C and LASO, MDMD and and DEGROOT, N and DELAVAISSIERE, C and DELOTTO, B and DEMIN, A and and DIJKSTRA, H and DICIACCIO, L and DJAMA, F and DOLBEAU, J and DOLL, O and and DONSZELMANN, M and DOROBA, K and DRACOS, M and DREES, J and DRIS, M and and DUFOUR, Y and DULINSKI, W and DZHELYADIN, R and EEK, LO and EEROLA, PAM and and EKELOF, T and EKSPONG, G and PEISERT, AE and ENGEL, JP and and FASSOULIOTIS, D and FEINDT, M and ALONSO, MF and FERRER, A and FILIPPAS, and TA and FIRESTONE, A and FOETH, H and FOKITIS, E and FOLEGATI, P and and FONTANELLI, F and FORBES, KAJ and FORSBACH, H and FRANEK, B and and FRENKIEL, P and FRIES, DC and FRODESEN, AG and FRUHWIRTH, R and and FULDAQUENZER, F and FURNIVAL, K and FURSTENAU, H and FUSTER, J and and GALEAZZI, G and GAMBA, D and GARCIA, C and GARCIA, J and GASPAR, C and and GASPARINI, U and GAVILLET, P and GAZIS, EN and GERBER, JP and and GIACOMELLI, P and GLITZA, KW and GOKIELI, R and GOLOVATYUK, VM and and CADENAS, JJGY and GOOBAR, A and GOPAL, G and GORSKI, M and GRACCO, V and and GRANT, A and GRARD, F and GRAZIANI, E and GROSDIDIER, G and GROSS, E and and GROSSEWIESMANN, P and GROSSETETE, B and GUY, J and HAHN, F and HAHN, M and and HAIDER, S and HAJDUK, Z and HAKANSSON, A and HALLGREN, A and and HAMACHER, K and DEMONCHENAULT, GH and HARRIS, FJ and HECK, BW and and HENKES, T and HERBST, I and HERNANDEZ, JJ and HERQUET, P and HERR, H and and HIETANEN, I and HIGGINS, CO and HIGON, E and HILKE, HJ and HODGSON, SD and and HOFMOKL, T and HOLMES, R and HOLMGREN, SO and HOLTHUIZEN, D and and HONORE, PF and HOOPER, JE and HOULDEN, M and HRUBEC, J and HULTH, PO and and HULTQVIST, K and HUSSON, D and IOANNOU, P and ISENHOWER, D and IVERSEN, and PS and JACKSON, JN and JALOCHA, P and JARLSKOG, G and JARRY, P and and JEANMARIE, B and JOHANSSON, EK and JOHNSON, D and JONKER, M and JONSSON, and L and JUILLOT, P and KALKANIS, G and KALMUS, G and KAPUSTA, F and and KATSANEVAS, S and KATSOUFIS, EC and KERANEN, R and KESTEMAN, J and and KHOMENKO, BA and KHOVANSKI, NN and KING, B and KJAER, NJ and KLEIN, H and and KLEMPT, W and KLOVNING, A and KLUIT, P and KOCHMEHRIN, A and KOEHNE, and JH and KOENE, B and KOKKINIAS, P and KOPF, M and KORATZINOS, M and and KORCYL, K and KORYTOV, AV and KOSTIUKHIN, V and KOURKOUMELIS, C and and KREUZBERGER, T and KROLIKOWSKI, J and KRONKVIST, I and KRSTIC, J and and KRUENERMARQUIS, U and KRUPINSKI, W and KUCEWICZ, W and KURVINEN, K and and LACASTA, C and LAMBROPOULOS, C and LAMSA, JW and LANCERI, L and LAPIN, V and and LAUGIER, JP and LAUHAKANGAS, R and LEDER, G and LEDROIT, F and and LEITNER, R and LEMOIGNE, Y and LEMONNE, J and LENZEN, G and LEPELTIER, V and and LETESSIERSELVON, A and LIEB, E and LIKO, D and LILLETHUN, E and and LINDGREN, J and LIPNIACKA, A and LIPPI, I and LLOSA, R and LOERSTAD, B and and LOKAJICEK, M and LOKEN, JG and LOPEZFERNANDEZ, A and AGUERA, MAL and and LOS, M and LOUKAS, D and LOUNIS, A and LOZANO, JJ and LUTZ, P and LYONS, and L and MAEHLUM, G and MAGNUSSEN, N and MAILLARD, J and MALTEZOS, A and and MANDL, F and MARCO, J and MARGONI, M and MARIN, JC and MARKOU, A and and MARTI, S and MATHIS, L and MATORRAS, F and MATTEUZZI, C and MATTHIAE, G and and MAZZUCATO, M and MCCUBBIN, M and MCKAY, R and MCNULTY, R and and MENICHETTI, E and MEOLA, G and MERONI, C and MEYER, WT and MICHELOTTO, M and and MITAROFF, WA and MITSELMAKHER, GV and MJOERNMARK, U and MOA, T and and MOELLER, R and MOENIG, K and MONGE, MR and MORETTINI, P and MUELLER, H and and MURRAY, WJ and MURYN, B and MYATT, G and NARAGHI, F and NAUKORZEN, U and and NAVARRIA, FL and NEGRI, P and NIELSEN, BS and NIJJHAR, B and and NIKOLAENKO, V and OBRAZTSOV, V and OESTERBERG, K and OLSHEVSKI, AG and and ORAVA, R and OSTANKOV, A and OURAOU, A and PAGANONI, M and PAIN, R and and PALKA, H and PAPADOPOULOU, T and PAPE, L and PASSERI, A and PEGORARO, M and and PENNANEN, J and PEREVOZCHIKOV, V and PERNICKA, M and PERROTTA, A and and PIERRE, F and PIMENTA, M and PINGOT, O and POL, ME and POLOK, G and and POROPAT, P and PRIVITERA, P and PULLIA, A and RADOJICIC, D and RAGAZZI, and S and RATOFF, PN and READ, AL and REDAELLI, NG and REGLER, M and REID, D and and RENTON, PB and RESVANIS, LK and RICHARD, F and RICHARDSON, M and and RIDKY, J and RINAUDO, G and RODITI, I and ROMERO, A and RONCAGLIOLO, I and and RONCHESE, P and RONNQVIST, C and ROSENBERG, EI and ROSSI, U and and ROSSO, E and ROUDEAU, P and ROVELLI, T and RUCKSTUHL, W and RUHLMANN, V and and RUIZ, A and RYBICKI, K and SAARIKKO, H and SACQUIN, Y and SAJOT, G and and SALT, J and SANCHEZ, E and SANCHEZ, J and SANNINO, M and SCHAEFFER, and M and SCHAEL, S and SCHNEIDER, H and SCHYNS, MAE and SCURI, F and SEGAR, and AM and SEKULIN, R and SESSA, M and SETTE, G and SEUFERT, R and SHELLARD, and RC and SIEGRIST, P and SIMONETTI, S and SIMONETTO, F and SISSAKIAN, AN and and SKAALI, TB and SKJEVLING, G and SMADJA, G and SMIRNOV, N and SMITH, and GR and SOSNOWSKI, R and SPASSOFF, TS and SPIRITI, E and SQUARCIA, S and and STAECK, H and STANESCU, C and STAVROPOULOS, G and STICHELBAUT, F and and STOCCHI, A and STRAUSS, J and STRUB, R and SZCZEKOWSKI, M and SZEPTYCKA, and M and SZYMANSKI, P and TABARELLI, T and TAVERNIER, S and TCHIKILEV, O and and THEODOSIOU, GE and TILQUIN, A and TIMMERMANS, J and TIMOFEEV, VG and and TKATCHEV, LG and TODOROV, T and TOET, DZ and TOKER, O and TORASSA, E and and TORTORA, L and TRAINOR, MT and TREILLE, D and TREVISAN, U and TRISCHUK, and W and TRISTRAM, G and TRONCON, C and TSIROU, A and TSYGANOV, EN and and TURALA, M and TURCHETTA, R and TURLUER, ML and TUUVA, T and TYAPKIN, IA and and TYNDEL, M and TZAMARIAS, S and UEBERSCHAER, B and UEBERSCHAER, S and and ULLALAND, O and UVAROV, V and VALENTI, G and VALLAZZA, E and FERRER, JAV and and VANDERVELDE, C and VANAPELDOORN, GW and VANDAM, P and VANDONINCK, WK and and VARELA, J and VAZ, P and VEGNI, G and VENTURA, L and VENUS, W and and VERBEURE, F and VERTOGRADOV, LS and VIBERT, L and VILANOVA, D and and VITALE, L and VLASOV, E and VLASOV, EV and VLASSOPOULOS, S and and VODOPYANOV, AS and VOLLMER, M and VOLPONI, S and VOULGARIS, G and and VOUTILAINEN, M and VRBA, V and WAHLEN, H and WALCK, C and WALDNER, F and and WAYNE, M and WEILHAMMER, P and WERNER, J and WETHERELL, AM and WICKENS, and JH and WIKNE, J and WILKINSON, GR and WILLIAMS, WSC and WINTER, M and and WORMALD, D and WORMSER, G and WOSCHNAGG, K and YAMDAGNI, N and YEPES, P and and ZAITSEV, A and ZALEWSKA, A and ZALEWSKI, P and ZAVRTANIK, D and and ZEVGOLATAKOS, E and ZHANG, G and ZIMIN, NI and ZITO, M and ZITOUN, R and and FUNCHAL, RZ and ZUMERLE, G and ZUNIGA, J",
    journal = "PHYSICS LETTERS B",
    year = "1992",
    volume = "274",
    number = "2",
    pages = "230-238",
    publisher = "ELSEVIER SCIENCE BV",
    issn = "0370-2693",
    doi = "10.1016/0370-2693(92)90528-C",
    abstract = "We have searched for possible fourth family heavy neutrinos, pair
produced in Z0 decays, in a sample of about 112 000 hadronic Z0 final
states collected with the DELPHI detector. For all mixing matrix
elements we exclude a new Dirac neutrino lighter than 44.5 GeV at a 95%
confidence level, if the neutrino couples to the electron or muon
family, and lighter than 44.0 GeV, if the neutrino couples to the tau
family. Depending on the values of the mixing element and to which
lepton family the neutrino couples, we obtain mass limits up to 46.2
GeV. For all mixing matrix elements we exclude a new Majorana neutrino
lighter than 39.0 GeV, if it couples to the electron or the muon family,
and lighter than 38.2 GeV, if it couples to the tau family. Depending on
the values of the mixing matrix element and to which lepton family the
neutrino couples, we obtain mass limits up to 44.7 GeV. We also exclude
stable new Dirac neutrinos lighter than 45.0 GeV and new Majorana
neutrinos lighter than 39.5 GeV."
}