Search for Dirac magnetic monopoles in e( )e(-) collisions with the OPAL detector at LEP2

G Abbiendi; C Ainsley; PF Akesson; G Alexander; G Anagnostou; KJ Anderson; S Asai; D Axen; I Bailey; E Barberio; T Barillari; RJ Barlow; RJ Batley; P Bechtle; T Behnke; KW Bell; PJ Bell; G Bella; A Bellerive; G Benelli; S Bethke; O Biebel; O Boeriu; P Bock; M Boutemeur; S Braibant; RM Brown; HJ Burckhart; S Campana; P Capiluppi; RK Carnegie; AA Carter; JR Carter; CY Chang; DG Charlton; C Ciocca; M Cozzi; A Csilling; M Cuffiani; S Dado; GM Dallavalle; A De Roeck; EA De Wolf; K Desch; B Dienes; J Dubbert; E Duchovni; G Duckeck; IP Duerdoth; E Etzion; F Fabbri; P Ferrari; F Fiedler; I Fleck; M Ford; A Frey; P Gagnon; JW Gary; C Geich-Gimbel; G Giacomelli; P Giacomelli; M Giunta; J Goldberg; E Gross; J Grunhaus; M Gruwe; A Gupta; C Hajdu; M Hamann; GG Hanson; A Harel; M Hauschild; CM Hawkes; R Hawkings; G Herten; RD Heuer; JC Hill; D Horvath; P Igo-Kemenes; K Ishii; H Jeremie; P Jovanovic; TR Junk; J Kanzaki; D Karlen; K Kawagoe; T Kawamoto; RK Keeler; RG Kellogg; BW Kennedy; S Kluth; T Kobayashi; M Kobel; S Komamiya; T Kraemer; A Krasznahorkay; P Krieger; J von Krogh; T Kuhl; M Kupper; GD Lafferty; H Landsman; D Lanske; D Lellouch; J Letts; L Levinson; J Lillich; SL Lloyd; FK Loebinger; J Lu; A Ludwig; J Ludwig; W Mader; S Marcellini; AJ Martin; T Mashimo; P Maettig; J McKenna; RA McPherson; F Meijers; W Menges; FS Merritt; H Mes; N Meyer; A Michelini; S Mihara; G Mikenberg; DJ Miller; W Mohr; T Mori; A Mutter; K Nagai; I Nakamura; H Nanjo; HA Neal; SW O'Neale; A Oh; MJ Oreglia; S Orito; C Pahl; G Pasztor; JR Pater; JE Pilcher; J Pinfold; DE Plane; O Pooth; M Przybycien; A Quadt; K Rabbertz; C Rembser; P Renkel; JM Roney; AM Rossi; Y Rozen; K Runge; K Sachs; T Saeki; EKG Sarkisyan; AD Schaile; O Schaile; P Scharff-Hansen; J Schieck; T Schoerner-Sadenius; M Schroeder; M Schumacher; R Seuster; TG Shears; BC Shen; P Sherwood; A Skuja; AM Smith; R Sobie; S Soeldner-Rembold; F Spano; A Stahl; D Strom; R Stroehmer; S Tarem; M Tasevsky; R Teuscher; MA Thomson; E Torrence; D Toya; I Trigger; Z Trocsanyi; E Tsur; MF Turner-Watson; I Ueda; B Ujvari; CF Vollmer; P Vannerem; R Vertesi; M Verzocchi; H Voss; J Vossebeld; CP Ward; DR Ward; PM Watkins; AT Watson; NX Watson; PS Wells; T Wengler; N Wermes; GW Wilson; JA Wilson; G Wolf; TR Wyatt; S Yamashita; D Zer-Zion; L Zivkovic

Journal article

Search for Dirac magnetic monopoles in e( )e(-) collisions with the OPAL detector at LEP2

G Abbiendi, C Ainsley, PF Akesson, G Alexander, G Anagnostou, KJ Anderson, S Asai, D Axen, I Bailey, E Barberio, T Barillari, RJ Barlow, RJ Batley, P Bechtle, T Behnke, KW Bell, PJ Bell, G Bella, A Bellerive, G Benelli Show all

PHYSICS LETTERS B | ELSEVIER SCIENCE BV | Published : 2008

DOI: 10.1016/j.physletb.2008.03.057

Abstract

This Letter describes a direct search for pair produced magnetic monopoles in e+ e- collisions. The analysis is based on 62.7 pb-1 of data collected with the OPAL detector at an average centre-of-mass energy of sqrt(s) = 206.3 GeV. The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss d E / d x in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section (σ) in the mass range 45 GeV / c2 < mM < 102 GeV / c2. The average limit is σ < 0.05 pb and is essentially independent of the magnetic monopole mass. The cros..

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