Search for excited neutrinos at HERA
C. AdloffFachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, GermanyV. AndreevLebedev Physical Institute, Moscow, Russia 12 15B. AndrieuÉcole Polytechnique, Palaiseau, FranceT. AnthonisInter-University Institute for High Energies ULB-VUB, Brussels; Universitaire Instelling Antwerpen, Wilrijk; Belgium 10V. ArkadovDESY, Zeuthen, GermanyA. AstvatsatourovDESY, Zeuthen, GermanyA. BabaevLPNHE, Universités Paris VI and VII, IN2P3-CNRS, Paris, FranceJ. BährDESY, Zeuthen, GermanyP. BaranovLebedev Physical Institute, Moscow, Russia 12 15E. BarreletInstitut National de Physique Nucléaire et de Physique des ParticulesW. BartelPete S. BatePhysics Department, University of Manchester, Manchester, UK 8J. BeckerPhysik-Institut der Universität Zürich, Zürich, Switzerland 17A. BeglarianYerevan Physics Institute, Yerevan, ArmeniaO. BehnkePhysikalisches Institut, Universität Heidelberg, Heidelberg, Germany 9C. BeierKirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany 9A. BelousovLebedev Physical Institute, Moscow, Russia 12 15T. BenischCh. BergerI. Physikalisches Institut der RWTH, Aachen, Germany 9T. BerndtKirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany 9J.C. BizotLAL, Université de Paris-Sud, IN2P3-CNRS, Orsay, FranceJ. BoehmeV. BoudryÉcole Polytechnique, Palaiseau, FranceW. BraunschweigI. Physikalisches Institut der RWTH, Aachen, Germany 9V. BrissonUniversité Paris Cité, Paris, FranceH.-B. BrökerIII. Physikalisches Institut der RWTH, Aachen, Germany 9Dunstan BrownW. BrücknerMax Planck Society, Munich, GermanyD. BrunckoInstitute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic 12 13J. BürgerF.W. BüsserII. Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany 9A. BunyatyanYerevan Physics Institute, Yerevan, ArmeniaA. BurrageDepartment of Physics, University of Liverpool, Liverpool, UK 8G. BuschhornMax-Planck-Institut für Physik, München, GermanyL. BystritskayaInstitute for Theoretical and Experimental Physics, Moscow, Russia 19A.J. CampbellJun CaoUniversité Paris CitéS. CaronI. Physikalisches Institut der RWTH, Aachen, Germany 9F. Cassol-BrunnerCPPM, CNRS/IN2P3, Univ. Mediterranee, Marseille, FranceD. ClarkeRutherford Appleton Laboratory, Chilton, Didcot, UK 8B. ClerbauxInter-University Institute for High Energies ULB-VUB, Brussels; Universitaire Instelling Antwerpen, Wilrijk; Belgium 10C. CollardInter-University Institute for High Energies ULB-VUB, Brussels; Universitaire Instelling Antwerpen, Wilrijk; Belgium 10J.G. ContrerasInstitut für Physik, Universität Dortmund, Dortmund, Germany 9Y.R. CoppensSchool of Physics and Space Research, University of Birmingham, Birmingham, UK 8J. A. CoughlanRutherford Appleton Laboratory, Chilton, Didcot, UK 8M.-C. CousinouCentre National de la Recherche Scientifique, Paris, FranceB. E. CoxPhysics Department, University of Manchester, Manchester, UK 8G. CozzikaDSM (Netherlands), Heerlen, NetherlandsJ. CvachCzech Academy of Sciences, Prague, CzechiaJ.B. DaintonDepartment of Physics, University of Liverpool, Liverpool, UK 8W.D. DauInstitut für experimentelle und Angewandte Physik, Universität Kiel, Kiel, GermanyK. DaumFachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, GermanyMarcus DavidssonPhysics Department, University of Lund, Lund, Sweden 14B. DelcourtLAL, Université de Paris-Sud, IN2P3-CNRS, Orsay, FranceNicolas DelerueCentre National de la Recherche Scientifique, Paris, FranceR. DemirchyanYerevan Physics Institute, Yerevan, ArmeniaA. De RoeckDESY, Hamburg, GermanyE. A. De WolfInter-University Institute for High Energies ULB-VUB, Brussels; Universitaire Instelling Antwerpen, Wilrijk; Belgium 10C. DiaconuCPPM, CNRS/IN2P3, Univ. Mediterranee, Marseille, FranceJ. DingfelderPhysikalisches Institut, Universität Heidelberg, Heidelberg, Germany 9P. DixonQueen Mary and Westfield College, London, UK 8V. DodonovMax-Planck-Institut für Kernphysik, Heidelberg, GermanyJ.D. DowellSchool of Physics and Space Research, University of Birmingham, Birmingham, UKA. DroutskoiInstitute for Nuclear Physics, Cracow, PolandA. DubakMax Planck Society, Munich, GermanyC. DuprelIII. Physikalisches Institut der RWTH, Aachen, Germany 9G. EckerlinD. EcksteinDESY, Zeuthen, GermanyV. EfremenkoJoint Institute for Nuclear Research, Dubna, RussiaS. EgliPaul Scherrer Institut, Villigen, SwitzerlandR. EichlerInstitut für Teilchenphysik, ETH, Zürich, Switzerland 17F. EiselePhysikalisches Institut, Universität Heidelberg, Heidelberg, Germany 9E. EisenhandlerQueen Mary and Westfield College, London, UK 8M. EllerbrockPhysikalisches Institut, Universität Heidelberg, Heidelberg, Germany 9E. ElsenDESY, Hamburg, GermanyM. ErdmannDESY, Hamburg, GermanyPeter FaulknerSupported by the UK Particle Physics and Astronomy Research Council,L. FavartJoint Institute for Nuclear Research, Dubna, RussiaA. FedotovJoint Institute for Nuclear Research, Dubna, RussiaR. FelstAlso at Physics Department, National Technical University, Zografou Campus, GR-15773 Athens, GreeceJ. FerenceiInstitute for Nuclear Physics, Cracow, PolandS. FerronLPNHE, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, FranceM. FleischerAlso at Physics Department, National Technical University, Zografou Campus, GR-15773 Athens, GreeceY.H. FlemingAlso at Physics Department, National Technical University, Zografou Campus, GR-15773 Athens, GreeceG. FlüggeIII. Physikalisches Institut der RWTH, Aachen, Germany 9A. FomenkoLebedev Physical Institute, Moscow, Russia 12 15I. ForestiPhysik-Institut der Universität Zürich, Zürich, Switzerland 17J. FormánekFaculty of Mathematics and Physics, Charles University, Praha, Czech Republic 12 16G. FrankeInstitut National de Physique Nucléaire et de Physique des ParticulesE. GabathulerDepartment of Physics, University of Liverpool, Liverpool, UK 8K. GabathulerInstitute for Nuclear Physics, Cracow, PolandJ. GarveyJoint Institute for Nuclear Research, Dubna, RussiaJ. GassnerPaul Scherrer Institut, Villigen, SwitzerlandJ. GaylerInstitute for Nuclear Physics, Cracow, PolandR. GerhardsInstitute for Nuclear Physics, Cracow, PolandC. GerlichPhysikalisches Institut, Universität Heidelberg, Heidelberg, Germany 9S. GhazaryanInter-University Institute for High Energies ULB-VUB, Brussels; Universitaire Instelling Antwerpen, Wilrijk; Belgium 10L. GoerlichInstitute for Nuclear Physics, Cracow, Poland 11N. GogitidzeLebedev Physical Institute, Moscow, Russia 12 15
2002en
ABI
Annotatsiya
We present a search for excited neutrinos using e − p data taken by the H1 experiment at HERA at a center-of-mass energy of 318 GeV with an integrated luminosity of 15 pb −1 . No evidence for excited neutrino production is found. Mass dependent exclusion limits are determined for the ratio of the coupling to the compositeness scale, f / Λ , independently of the relative couplings to the SU(2) and U(1) gauge bosons. These limits extend the excluded region to higher masses than has been possible in previous searches at other colliders.
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