6533b830fe1ef96bd1297cf4
RESEARCH PRODUCT
Searches for heavy neutrinos from Z decays
A. PasseriA. G. OlshevskiL. ChaussardP. PoropatH. FurstenauE. G. AnassontzisJ. P. EngelM. V. Castillo GimenezV. RuhlmannP. VazC. Vander VeldeL. MathisN. DemariaG. DamgaardG. SmadjaA. ZalewskaL. O. EekR. C. ShellardL. Di CiaccioJosef HrubecM. BonapartW. T. MeyerO. PingotRana R. MckayY. DufourSandor CzellarA. J. Camacho RozasAntonio FerrerP. JalochaT. TabarelliA. M. SegarMikko VoutilainenG. PolokPiotr ZalewskiR. SekulinD. Z. ToetP. SiegristH. P. BornerStefano RagazziE. LiebKlaus MoenigM. SchaefferG. E. TheodosiouS. C. BlythP. S. IversenM.d.m. De Fez LasoLouis LyonsC. LambropoulosUgo AmaldiW. De BoerE. ZevgolatakosJ. J. HernandezPaul BaillonM. SzeptyckaD. FassouliotisG. WormserPieter DavidM. RichardsonF. CaoG. MaehlumW. TrischukA. BaroncelliGuy WilkinsonL. G. TkatchevW. KrupinskiPatrick JarryF. LedroitJacques LemonneA. PerrottaS. VlassopoulosG. BorisovO. UllalandW. MitaroffM. TyndelA. ChanI. HerbstS. DagoretG. RinaudoV.a. UvarovW.s.c. WilliamsV. GraccoDemetrios LoukasS. HaiderP. Van DamT. KreuzbergerAlexander ZaitsevR. MoellerG. StavropoulosF. StichelbautG. Hamel De MonchenaultM. BaubillierD. VilanovaJosef StraussV. ChorowiczG. GaleazziM. BattagliaW. Van DoninckM. ReglerRoberto CirioL. K. ResvanisD. ZavrtanikRenato TurchettaU. TrevisanEdoardo CastelliF. PierreItzhak RoditiE. K. JohanssonA. FirestoneM. PernickaS. BraibantJ-c. MarinR. GokieliG. W. Van ApeldoornD. J. HolthuizenF. RichardF. BianchiF. AdamiM. FeindtI. HietanenC. De La VaissiereC. MatteuzziR. LlosaPierre AstierSpyros TzamariasO. TchikilevL. VenturaJesus MarcoR. StrubM. HahnS. AlmehedW. VenusA. TsirouTiziano RovelliP. KokkiniasM. KoratzinosB. FranekF. KapustaJürgen H. WernerN. MagnussenMassimo CacciaJ. SanchezPh. CharpentierTh. D. PapadopoulouG. EkspongJ. N. JacksonG. ZhangT. B. SkaaliK. FurnivalR. KeranenGuenakh MitselmakherG. SajotY. LemoigneA. TilquinFrancisco MatorrasMaria Elena PolMartino MargoniM. KopfY. SacquinS. KatsanevasJ. E. AugustinP. D. DaunceyG. MatthiaeN. YamdagniGiovanni DarboD. R. JohnsonE. FokitisE. I. RosenbergG. D. AlekseevE. TorassaS-o. HolmgrenP. SzymanskiS. SimonettiM. BegalliB. ÅSmanR. McnultyF. CarenaI. KronkvistBarry KingA. CampionE. SpiritiS. VolponiJ. Cuevas MaestroP. AbreuJ. GarciaM. VollmerC. RonnqvistP. NegriM. MazzucatoP. JuillotO. DollJ. G. LokenP. WeilhammerM. Fernandez AlonsoWolfgang AdamR. FrühwirthC. KourkoumelisJosé SaltA. P. OstankovU. RossiM. JonkerPaolo GiacomelliM. T. TrainorK. KurvinenL. JonssonM. MccubbinR. Zukanovich FunchalMarc WinterJelena KrsticG. LenzenA. Lopez-fernandezJ. TimmermansR. ZitounO. TokerL. VibertF. DjamaV. ObraztsovT. A. FilippasA. LipniackaC. TronconJon Christopher WikneF. Fulda-quenzerD. BertrandCristian StanescuP. BranchiniYu. BelokopytovH. SchneiderLuc PapeV. NikolaenkoTuure TuuvaH. ForsbachM. BoratavS. DelormeV. LepeltierA. S. VodopyanovK. HultqvistR. A. BrennerTord EkelofR. LauhakangasV. KostiukhinH. StaeckA. Letessier-selvonAriel GoobarG. P. GopalJ. H. KoehneN. BrummerW. D. ApelPaolo ChecchiaLucio CerritoAriella CattaiU. GaspariniR. SosnowskiI. RoncaglioloL. BuggeC.j. BeestonE. GrazianiJ. M. BrunetW. RuckstuhlF. NaraghiH. B. CrawleyP. N. BogolubovE. Dahl-jensenT. HenkesG. CrosettiEvgueni VlasovG. VegniS. J. AlvsvaagB. LoerstadPh. GavilletT. MoaK. H. BecksE. VallazzaDietrich LikoS. SchaelA. De MinJoao VarelaB. GrosseteteAllan HallgrenRupert LeitnerM. PaganoniGiovanni ValentiV. G. TimofeevK. A. J. ForbesM. DonszelmannG. MeolaH. WahlenAbdenour LounisP. BeltranJ. J. Gomez Y CadenasW. KucewiczD. IsenhowerS. D. HodgsonF. CouchotH. BurmeisterB. KoeneR. PainH. HerrK. D. BrandJ. PennanenClaire BourdariosFlavio FontanelliJ. BjarneRobert S. BrownG. KalmusA. G. FrodesenT. BuranB. DalmagneLaurent ChevalierM. TuralaP. AntilogusGueorgui ChelkovS. SquarciaJ. P. GerberR. HolmesH. SaarikkoA. MarkouT. TodorovP. BorgeaudU. Kruener-marquisS. MartiH. MuellerA. Koch-mehrinAlastair GrantM. L. TurluerB. De LottoK. RybickiW. KlemptP. BilloirF. HahnTorsten Paul Ake ÅKessonPaolo RoncheseGeorge KalkanisP. B. RentonMilos LokajicekA. PulliaMarco SessaA. MaltezosR. OravaP. N. RatoffD. ReidK. W. GlitzaEugene P. GrossOlga BotnerN. J. KjaerDaniel TreilleP. HerquetPaolo MorettiniW. DulinskiMogens DamGianni ZumerleZ. HajdukR. ContriU. Nau-korzenR. DzhelyadinP. BeilliereKrzysztof KorcylV. BocciMaciej GórskiL. TortoraF. J. HarrisCarmen GarcíaJ. E. HooperM. DavenportA. HakanssonC. GasparJ. LindgrenT. HofmoklD. C. FriesMarek SzczekowskiKlaus HamacherF. VerbeureB. NijjharC. BricmanJ. DreesCarlos LacastaJ. DolbeauP. FolegatiM. ChapkinJose M. BenllochH. FoethR. J. ApsimonP. BambadeD. WormaldG. TristramPaula EerolaE. VlasovB. UeberschaerHans DijkstraP.s.l. BoothP. V. ChliapnikovM. PimentaM. HouldenManolis DrisA. M. WetherellM. MichelottoGuido BarbielliniP. Grosse-wiesmannG. GrosdidierR. BarateM. BerggrenP. PriviteraM. CrozonNikita SmirnovChiara MeroniH. PalkaG. SkjevlingAlessandra RomeroA. AugustinusA. De AngelisP. CollinsD. DelikarisJ. GuyJ. W. LamsaA. RuizJ. KestemanE. C. KatsoufisTim AdyeM. A E SchynsM. ZitoF. BaraoDaniel BlochE. LillethunP. F. HonorePaul AllenM. S. BilenkyMarta CalviM. R. MongeA. N. SissakianAhmimed OuraouV.m. GolovatyukC. CasoGeoffrey SmithE. HigonP. O. HulthR. SeufertF. ScuriE. RossoH. KleinL. LanceriP. DelpierreE. DaubieO. BarringM. P. ClaraG. MyattC. O. HigginsMario SanninoM. A. Lopez AgueraB. BouquetM. LosM. J. BatesEvangelos GazisG. LederE. MenichettiM. DracosD. GambaM. De BeerM. BonesiniG. VoulgarisC. WalckT. BologneseW. BoniventoV. VrbaD. HussonI. A. TyapkinT. S. SpassoffAlexander Lincoln ReadJuan FusterD. Y. BardinP. KluitP. YepesGoeran JarlskogK. WoschnaggH. J. HilkeE. J. SanchezP. RoudeauG. SetteA. Elliot PeisertH. De BoeckB. Jean-marieM. PegoraroJ. MaillardB. BoštjančičV. PerevozchikovTiziano CamporesiG. CosmeN. G. RedaelliBorge Svane NielsenJ. J. LozanoMarco BozzoKrzysztof DorobaJan BuytaertP. FrenkielP. IoannouF. WaldnerD. BenedicN.i. ZiminS. UeberschaerStefaan TavernierB. A. KhomenkoN. De GrootA. StocchiFrancesco NavarriaC. DefoixJ. ZúñigaFrancesca Romana CavalloMitchell WayneL.j. CarrollV. V. LapinC. De ClercqJ. A. Valls FerrerW. J. MurrayV. CanaleA. KlovningU. MjoernmarkC. BosioAndrey KorytovI. LippiE.n. TsyganovJ. H. WickensB. MurynJose Luis ContrerasJan KrolikowskiN. N. KhovanskiW. BartlK. OesterbergL. VitaleJ. P. LaugierL. S. VertogradovD. RadojicicJan RidkyP. LutzF. SimonettoFernand GrardD. CrennellF. MandlB. W. Hecksubject
Z-PEAK; LEPTONS; RESONANCE; LIMITS; QUARKSNuclear and High Energy PhysicsParticle physicsPhysics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaElectron–positron annihilationHadron01 natural sciencesNuclear physicsLIMITS0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]QUARKSNuclear Experiment010306 general physicsMixing (physics)PhysicsMuon010308 nuclear & particles physicsDirac (video compression format)High Energy Physics::PhenomenologyRESONANCEZ-PEAKMAJORANALEPTONSPhysique des particules élémentairesFísica nuclearHigh Energy Physics::ExperimentNeutrinoParticle Physics - ExperimentLeptondescription
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.
year | journal | country | edition | language |
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1992-01-01 |