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Search for Excited Electrons at HERA

C. Adloff V. Andreev B. Andrieu 1 T. Anthonis A. Astvatsatourov A. Babaev J. Bahr P. Baranov E. Barrelet 2 W. Bartel S. Baumgartner J. Becker M. Beckingham A. Beglarian O. Behnke A. Belousov C. Berger T. Berndt J.C. Bizot 3 J. Bohme V. Boudry 1 W. Braunschweig V. Brisson 3 H.B. Broker D.P. Brown D. Bruncko F.W. Busser A. Bunyatyan A. Burrage G. Buschhorn L. Bystritskaya A.J. Campbell S. Caron F. Cassol-Brunner 4 D. Clarke C. Collard J.G. Contreras Y.R. Coppens J.A. Coughlan M.C. Cousinou 4 B.E. Cox G. Cozzika J. Cvach J.B. Dainton W.D. Dau K. Daum M. Davidsson B. Delcourt 3 N. Delerue 4 R. Demirchyan A. de Roeck E.A. de Wolf C. Diaconu 4 J. Dingfelder P. Dixon V. Dodonov J.D. Dowell A. Droutskoi A. Dubak C. Duprel G. Eckerlin D. Eckstein V. Efremenko S. Egli R. Eichler F. Eisele E. Eisenhandler M. Ellerbrock E. Elsen M. Erdmann W. Erdmann P.J.W. Faulkner L. Favart A. Fedotov R. Felst J. Ferencei S. Ferron 1 M. Fleischer P. Fleischmann Y.H. Fleming G. Flugge A. Fomenko I. Foresti J. Formanek G. Franke G. Frising E. Gabathuler K. Gabathuler J. Garvey J. Gassner J. Gayler R. Gerhards C. Gerlich S. Ghazaryan L. Goerlich N. Gogitidze C. Grab V. Grabski H. Grassler T. Greenshaw G. Grindhammer T. Hadig D. Haidt L. Hajduk J. Haller B. Heinemann G. Heinzelmann R.C.W. Henderson S. Hengstmann H. Henschel R. Heremans G. Herrera I. Herynek M. Hildebrandt M. Hilgers K.H. Hiller J. Hladky P. Hoting D. Hoffmann 4 R. Horisberger A. Hovhannisyan S. Hurling M. Ibbotson C. Issever M. Jacquet 3 M. Jaffre 3 L. Janauschek X. Janssen V. Jemanov L. Jonsson C. Johnson D.P. Johnson M.A.S. Jones H. Jung D. Kant M. Kapichine M. Karlsson O. Karschnick J. Katzy F. Keil N. Keller J. Kennedy I.R. Kenyon C. Kiesling P. Kjellberg M. Klein C. Kleinwort T. Kluge G. Knies B. Koblitz S.D. Kolya V. Korbel P. Kostka S.K. Kotelnikov R. Koutouev A. Koutov J. Kroseberg K. Kruger T. Kuhr D. Lamb M.P.J. Landon W. Lange T. Lastovicka P. Laycock E. Lebailly 3 A. Lebedev B. Leiner R. Lemrani V. Lendermann S. Levonian B. List E. Lobodzinska B. Lobodzinski A. Loginov N. Loktionova V. Lubimov S. Luders D. Luke L. Lytkin N. Malden E. Malinovski S. Mangano R. Maracek P. Marage J. Marks R. Marshall H.U. Martyn J. Martyniak S.J. Maxeld D. Meer A. Mehta K. Meier A.B. Meyer H. Meyer J. Meyer 1 S. Michine S. Mikocki D. Milstead S. Mohrdieck M.N. Mondragon F. Moreau 1 A. Morozov J.V. Morris K. Muller P. Murn V. Nagovizin B. Naroska J. Naumann T. Naumann P.R. Newman F. Niebergall C. Niebuhr O. Nix G. Nowak M. Nozicka B. Olivier J.E. Olsson D. Ozerov V. Panassik C. Pascaud G.D. Patel M. Peez 4 Emile Perez A. Petrukhin J.P. Phillips D. Pitzl R. Poschl I. Potachnikova B. Povh J. Rauschenberger P. Reimer B. Reisert C. Risler E. Rizvi P. Robmann R. Roosen A. Rostovtsev S. Rusakov K. Rybicki D.P.C. Sankey S. Schatzel J. Scheins F.P. Schilling P. Schleper D. Schmidt S. Schmidt S. Schmitt M. Schneider 4 L. Schoeffel A. Schoning T. Schorner V. Schroder H.C. Schultz-Coulon C. Schwanenberger K. Sedlak F. Sefkow V. Chekelian I. Sheviakov L.N. Shtarkov Y. Sirois 1 T. Sloan P. Smirnov Y. Soloviev D. South V. Spaskov A. Specka 1 H. Spitzer R. Stamen B. Stella J. Stiewe I. Strauch U. Straumann S. Tchetchelnitski G. Thompson P.D. Thompson F. Tomasz D. Traynor P. Truol G. Tsipolitis I. Tsurin J. Turnau J.E. Turney E. Tzamariudaki A. Uraev Martin Urban A. Usik S. Valkar A. Valkarova C. Vallee 4 P. van Mechelen A. Vargas Trevino S. Vassiliev Y. Vazdik C. Veelken A. Vest A. Vichnevski K. Wacker J. Wagner R. Wallny B. Waugh G. Weber D. Wegener C. Werner N. Werner M. Wessels G. White S. Wiesand T. Wilksen M. Winde G.G. Winter C. Wissing M. Wobisch E.E. Woehrling E. Wunsch A.C. Wyatt J. Zacek J. Zalesak Zhiqing Zhang 3 A. Zhokin F. Zomer 3 M. Zur Nedden
Abstract : A search for excited electron e* production is described in which the electroweak decays e*->e gamma, e*->e Z and e*->nu W are considered. The data used correspond to an integrated luminosity of 120 pb^(-1) taken in e^(+-)p collisions from 1994 to 2000 with the H1 detector at HERA at centre-of-mass energies of 300 and 318 GeV. No evidence for a signal is found. Mass dependent exclusion limits are derived for the ratio of the couplings to the compositeness scale, f/Lambda. These limits extend the excluded region to higher masses than has been possible in previous direct searches for excited electrons.
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C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, A. Astvatsatourov, et al.. Search for Excited Electrons at HERA. Physics Letters B, Elsevier, 2002, 548, pp.35-44. ⟨in2p3-00012395⟩

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