Search for stable and long-lived massive charged particles in e+e− collisions at =130209 GeV

G. Abbiendi(Istituto Nazionale di Fisica Nucleare, Sezione di Bologna), C. Ainsley(University of Cambridge), P.F. Åkesson(University of Bonn), G. Alexander(Tel Aviv University), J. Allison(University of Manchester), P. Amaral(Fermi National Accelerator Laboratory), G. Anagnostou(University of Birmingham), K. J. Anderson(Fermi National Accelerator Laboratory), S. Arcelli(Istituto Nazionale di Fisica Nucleare, Sezione di Bologna), S. Asai(Kobe University), D. Axen(University of British Columbia), G. Azuelos(TRIUMF), I. Bailey(University of Victoria), E. L. Barberio(Southern Methodist University), R. J. Barlow(University of Manchester), R.J. Batley(University of Cambridge), P. Bechtle(Universität Hamburg), T. Behnke(Universität Hamburg), K. W. Bell(Rutherford Appleton Laboratory), P. J. Bell(University of Birmingham), G. Bella(Tel Aviv University), A. Bellerive(Carleton University), G. Benelli(University of California, Riverside), S. Bethke(Max Planck Society), O. Biebel(Ludwig-Maximilians-Universität München), O. E. Vickey Boeriu(University of Freiburg), P. Bock(Heidelberg University), M. Boutemeur(Ludwig-Maximilians-Universität München), S. Braibant(European Organization for Nuclear Research), L. Brigliadori(University of Bologna), R. M. Brown(Rutherford Appleton Laboratory), K. Buesser(Universität Hamburg), H. Burckhart(European Organization for Nuclear Research), S. Campana(University of California, Riverside), R.K. Carnegie(Carleton University), B. Caron(University of Alberta), A. A. Carter(Queen Mary University of London), J.R. Carter(University of Cambridge), C.Y. Chang(University of Maryland, College Park), D. G. Charlton(University of Birmingham), Á. Csilling(Institute for Particle and Nuclear Physics), M. Cuffiani(University of Bologna), S. Dado(Technion – Israel Institute of Technology), A. De Roeck(European Organization for Nuclear Research), E. A. De Wolf(University of Antwerp), K. Desch(Universität Hamburg), B. Dienes(University of Birmingham), M. Donkers(Carleton University), J. Dubbert(Ludwig-Maximilians-Universität München), E. Duchovni(Weizmann Institute of Science), G. Duckeck(Ludwig-Maximilians-Universität München), I. P. Duerdoth(University of Manchester), E. Etzion(Tel Aviv University), F. Fabbri(University of Bologna), L. Feld(University of Freiburg), P. Ferrari(European Organization for Nuclear Research), F. Fiedler(Ludwig-Maximilians-Universität München), I. Fleck(University of Freiburg), M. Ford(University of Cambridge), A. Frey(European Organization for Nuclear Research), A. Fürtjes(European Organization for Nuclear Research), P. Gagnon(Indiana University Bloomington), J. W. Gary(University of California, Riverside), G. Gaycken(Universität Hamburg), Ch. Geich-Gimbel(University of Bonn), G. Giacomelli(University of Bologna), P. Giacomelli(University of Bologna), M. Giunta(University of California, Riverside), J. Goldberg(Technion – Israel Institute of Technology), E. Ros(Weizmann Institute of Science), J. Grunhaus(Tel Aviv University), M. Gruwé(European Organization for Nuclear Research), P. O. Günther(University of Bonn), A. Gupta(University of Chicago), C. Hajdu(Universität Hamburg), M. Hamann(Universität Hamburg), G.G. Hanson(University of California, Riverside), K. Harder(Universität Hamburg), A. Harel(Technion – Israel Institute of Technology), M. Harin-Dirac(University of California, Riverside), M. Hauschild(European Organization for Nuclear Research), C. M. Hawkes(University of Birmingham), R. J. Hawkings(European Organization for Nuclear Research), R.J. Hemingway(Carleton University), C. Hensel(Universität Hamburg), G. Herten(University of Freiburg), Rolf-Dieter Heuer(Universität Hamburg), J. C. Hill(University of Cambridge), K. D. Hoffman(University of Chicago), Dezső Horváth(University of British Columbia), P. Igo-Kemenes(Heidelberg University), K. Ishii(The University of Tokyo), H. Jérémie(Université de Montréal), P. Jovanović(University of Birmingham), T. R. Junk(Carleton University), N. Kanaya(University of Victoria), J. Kanzaki(The University of Tokyo), G. Karapetian(Université de Montréal), D. Karlen(University of Victoria), K. Kawagoe(The University of Tokyo), T. Kawamoto(The University of Tokyo), R. Keeler(University of Victoria), R. G. Kellogg(University of Maryland, College Park), B. W. Kennedy(Rutherford Appleton Laboratory), D. H. Kim(University of Oregon), K. Klein(Heidelberg University), A. Klier(Weizmann Institute of Science), S. Kluth(Max Planck Society), T. Kobayashi(The University of Tokyo), M. Kobel(University of Bonn), S. Komamiya(The University of Tokyo), L. L. Kormos(University of Victoria), T. Krämer(Universität Hamburg), P. Krieger(University of Toronto), J. von Krogh(Heidelberg University), K. Krüger(European Organization for Nuclear Research), T. Kühl(Universität Hamburg), M. Kupper(Weizmann Institute of Science), G. Lafferty(University of Manchester), H. Landsman(Technion – Israel Institute of Technology), D. Lanske(RWTH Aachen University), J. G. Layter(University of California, Riverside), A. Leins(Ludwig-Maximilians-Universität München), D. Lellouch(Weizmann Institute of Science), J. Letts(University of California San Diego), L. J. Levinson(Weizmann Institute of Science), J. Lillich(University of Freiburg), S. L. Lloyd(Queen Mary University of London), F. K. Loebinger(University of Manchester), J. Lu(TRIUMF), J. Ludwig(University of Freiburg), A. Macpherson(University of Alberta), Wolfgang Mader(University of Bonn), S. Marcellini(University of Bologna), A. Martin(Queen Mary University of London), G. Masetti(University of Bologna), T. Mashimo(The University of Tokyo), P. Mättig(University of Wuppertal), W.J. McDonald(University of Alberta), J. A. McKenna(University of British Columbia), T. McMahon(University of Birmingham), R. A. McPherson(University of Victoria), F. Meijers(European Organization for Nuclear Research), W. Menges(Universität Hamburg), F. S. Merritt(University of Chicago), H. Mes(TRIUMF), A. Michelini(University of Bologna), S. Mihara(The University of Tokyo), G. Mikenberg(Weizmann Institute of Science), D.J. Miller(University College London), S. Moêd(Technion – Israel Institute of Technology), W. Mohr(University of Freiburg), T. Mori(The University of Tokyo), A. Mutter(University of Freiburg), K. Nagai(Queen Mary University of London), I. Nakamura(The University of Tokyo), H. Nanjo(The University of Tokyo), H. A. Neal(Yale University), R. Nisius(Max Planck Society), S.W. OʼNeale(University of Birmingham), A. Oh(European Organization for Nuclear Research), A. Okpara(Heidelberg University), M. J. Oreglia(University of Chicago), S. Orito(The University of Tokyo), C. Pahl(Max Planck Society), G. Pásżtor(University of California, Riverside), J. R. Pater(University of Manchester), G. N. Patrick(University of Birmingham), J. E. Pilcher(University of Chicago), J. L. Pinfold(University of Alberta), D.E. Plane(European Organization for Nuclear Research), B. Poli(University of Bologna), J. Polok(European Organization for Nuclear Research), O. Pooth(RWTH Aachen University), M. Przybycień(Jagiellonian University), A. Quadt(University of Bonn), K. Rabbertz(Karlsruhe Institute of Technology), C. Rembser(European Organization for Nuclear Research), P. Renkel(Weizmann Institute of Science), J. M. Roney(University of Victoria), S. Rosati(University of Bonn), Y. Rozen(Technion – Israel Institute of Technology), K. Runge(University of Freiburg), K. Sachs(Carleton University), T. Saeki(The University of Tokyo), E.K.G. Sarkisyan(University of Manchester), A.D. Schaile(Ludwig-Maximilians-Universität München), O. Schaile(Ludwig-Maximilians-Universität München), P. Scharff-Hansen(European Organization for Nuclear Research), J. Schieck(Max Planck Society), T. Schörner-Sadenius(European Organization for Nuclear Research), M. Schröder(European Organization for Nuclear Research), M. Schumacher(University of Bonn), C. Schwick(European Organization for Nuclear Research), W. G. Scott(Rutherford Appleton Laboratory), R. Seuster(RWTH Aachen University), T. Shears(University of Liverpool), B. C. Shen(University of California, Riverside), P. Sherwood(University College London), G. P. Siroli(University of Bologna), A. Skuja(University of Maryland, College Park), Andrew Smith(European Organization for Nuclear Research), R. Sobie(University of Victoria), S. Söldner‐Rembold(University of Manchester), F. Spanò(University of Chicago), A. Stahl(University of Bonn), K. Stephens(University of Manchester), D. M. Strom(University of Oregon), R. Ströhmer(Ludwig-Maximilians-Universität München), S. Tarem(Technion – Israel Institute of Technology), M. Taševský(European Organization for Nuclear Research), RJ Taylor(University College London), R. J. Teuscher(University of Chicago), M. Thomson(Hungarian Academy of Sciences), E. Torrence(University of Oregon), D. Toya(The University of Tokyo), P. Tran(University of California, Riverside), I. M. Trigger(European Organization for Nuclear Research), Z. L. Trocsanyi(University of Debrecen), E. Tsur(Tel Aviv University), M. F. Watson(University of Birmingham), I. Ueda(The University of Tokyo), B. Ujvári(University of Debrecen), C.F. Vollmer(Ludwig-Maximilians-Universität München), P. Vannerem(University of Freiburg), Róbert Vértesi(Cavendish Hospital), M. Verzocchi(University of Maryland, College Park), H. Voss(European Organization for Nuclear Research), J. H. Vossebeld(University of Liverpool), D. Waller(Carleton University), C. P. Ward(University of Cambridge), D. R. Ward(University of Cambridge), P. M. Watkins(University of Birmingham), A. T. Watson(University of Birmingham), N. K. Watson(University of Birmingham), P. S. Wells(European Organization for Nuclear Research), T. Wengler(European Organization for Nuclear Research), N. Wermes(University of Bonn), D. Wetterling(Heidelberg University), G. Wilson(University of Kansas), G. Wilson(University of Birmingham), G. Wolf(Weizmann Institute of Science), T. R. Wyatt(University of Manchester), Shinji Yamashita(The University of Tokyo), D. Zer-Zion(University of California, Riverside), L. Živković(Weizmann Institute of Science)
Physics Letters B
September 16, 2003
10.1016/s0370-2693(03)00639-7
Cited by 77Open Access
Full Text

Abstract

A search for stable and long-lived massive particles of electric charge |Q/e|=1 or fractional charges of 2/3, 4/3, and 5/3 is reported using data collected by the OPAL detector at LEP, at centre-of-mass energies from 130 to 209 GeV. These particles are assumed to be pair-produced in e+e− collisions and not to interact strongly. No evidence for the production of these particles was observed. Model-independent upper limits on the production cross-section between 0.005 and 0.028 pb have been derived for scalar and spin-1/2 particles with charge ±1. Within the framework of the Constrained Minimal Supersymmetric Standard Model (CMSSM), this implies a lower limit of 98.0 (98.5) GeV on the mass of long-lived right- (left-)handed scalar muons and scalar taus. Long-lived charged heavy leptons and charginos are excluded for masses below 102.0 GeV. For particles with fractional charge ±2/3, ±4/3 and ±5/3, the upper limit on the production cross-section varies between 0.005 and 0.020 pb. All mass and cross-section limits are derived at the 95% confidence level and are valid for particles with lifetimes longer than 10−6 s.

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