A study of muon pair production and evidence for tau pair production in photon-photon collisions at LEP

R. Akers, G. Alexander, J. Allison, K. J. Anderson, S. Arcelli, A. Astbury, D. Axen, G. Azuelos, J. T.M. Baines, A. H. Ball, J. Banks, R. J. Barlow, S. Barnett, R. Bartoldus, J. R. Batley, G. Beaudoin, A. Beck, G. A. Beck, J. Becker, C. BeestonT. Behnke, K. W. Bell, G. Bella, P. Bentkowski, P. Berlich, S. Bethke, O. Biebel, I. J. Bloodworth, P. Bock, B. Boden, H. M. Bosch, M. Boutemeur, H. Breuker, P. Bright-Thomas, R. M. Brown, A. Buijs, H. J. Burckhart, C. Burgard, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, S. L. Chu, P. E.L. Clarke, J. C. Clayton, I. Cohen, J. E. Conboy, M. Cooper, M. Coupland, M. Cuffiani, S. Dado, G. M. Dallavalle, S. De Jong, L. A. del Pozo, H. Deng, A. Dieckmann, M. Dittmar, M. S. Dixit, E. do Couto e Silva, J. E. Duboscq, E. Duchovni, G. Duckeck, I. P. Duerdoth, D. J.P. Dumas, P. A. Elcombe, P. G. Estabrooks, E. Etzion, H. G. Evans, F. Fabbri, B. Fabbro, M. Fierro, M. Fincke-Keeler, H. M. Fischer, D. G. Fong, M. Foucher, A. Gaidot, J. W. Gary, J. Gascon, N. I. Geddes, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, G. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, J. D. Gillies, J. Goldberg, D. M. Gingrich, M. J. Goodrick, W. Gorn, C. Grandi, F. C. Grant, J. Hagemann, G. G. Hanson, M. Hansroul, C. K. Hargrove, P. F. Harrison, J. Hart, P. M. Hattersley, M. Hauschild, C. M. Hawkes, E. Heflin, R. J. Hemingway, G. Herten, R. D. Heuer, J. C. Hill, S. J. Hillier, T. Hilse, D. A. Hinshaw, J. D. Hobbs, P. R. Hobson, D. Hochman, R. J. Homer, A. K. Honma, R. E. Hughes-Jones, R. Humbert, P. Igo-Kemenes, H. Ihssen, D. C. Imrie, A. C. Janissen, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, M. Jones, R. W.L. Jones, P. Jovanovic, C. Jui, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, J. King, S. Kluth, T. Kobayashi, D. S. Koetke, T. P. Kokott, S. Komamiya, J. F. Kral, R. Kowalewski, J. von Krogh, J. Kroll, P. Kyberd, G. D. Lafferty, H. Lafoux, R. Lahmann, J. Lauber, J. G. Layter, P. Leblanc, A. M. Lee, E. Lefebvre, M. H. Lehto, D. Lellouch, C. Leroy, J. Letts, L. Levinson, S. L. Lloyd, F. K. Loebinger, J. M. Lorah, B. Lorazo, M. J. Losty, X. C. Lou, J. Ludwig, A. Luig, M. Mannelli, S. Marcellini, C. Markus, A. J. Martin, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, J. McKenna, T. J. McMahon, J. R. McNutt, F. Meijers, D. Menszner, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, J. Mildenberger, D. J. Miller, R. Mir, W. Mohr, C. Moisan, A. Montanari, T. Mori, M. Mori, U. Müller, B. Nellen, H. H. Nguyen, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, C. J. Oram, M. J. Oreglia, S. Orito, J. P. Pansart, B. Panzer-Steindel, P. Paschievici, G. N. Patrick, N. Paz-Jaoshvili, M. J. Pearce, P. Pfister, J. E. Pilcher, J. Pinfold, D. Pitman, D. E. Plane, P. Poffenberger, B. Poli, T. W. Pritchard, H. Przysiezniak, G. Quast, M. W. Redmond, D. L. Rees, G. E. Richards, M. Rison, S. A. Robins, D. Robinson, A. Rollnik, J. M. Roney, E. Ros, S. Rossberg, A. M. Rossi, M. Rosvick, P. Routenburg, K. Runge, O. Runolfsson, D. R. Rust, M. Sasaki, C. Sbarra, A. D. Schaile, O. Schaile, W. Schappert, F. Scharf, P. Scharff-Hansen, P. Schenk, B. Schmitt, H. von der Schmitt, M. Schröder, C. Schwick, J. Schwiening, W. G. Scott, M. Settles, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Skillman, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, R. Sobie, R. W. Springer, M. Sproston, A. Stahl, C. Stegmann, K. Stephens, J. Steuerer, R. Ströhmer, D. Strom, H. Takeda, T. Takeshita, S. Tarem, M. Tecchio, P. Teixeira-Dias, N. Tesch, M. A. Thomson, E. Torrente-Lujan, S. Towers, G. Transtromer, N. J. Tresilian, T. Tsukamoto, M. F. Turner, D. Van den plas, R. Van Kooten, G. J. VanDalen, G. Vasseur, A. Wagner, D. L. Wagner, C. Wahl, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, M. Weber, P. Weber, P. S. Wells, N. Wermes, M. A. Whalley, B. Wilkens, G. W. Wilson, J. A. Wilson, V. H. Winterer, T. Wlodek, G. Wolf, S. Wotton, T. R. Wyatt, R. Yaari, A. Yeaman, G. Yekutieli, M. Yurko, W. Zeuner, G. T. Zorn

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Abstract

We have studied the reactions γγ→μ+μ- and γγ→τ+τ- by measuring the properties of events of the types e+e-→e+e-μ+ μ- and e+e-→e+e-τ+ τ- at e+e- centre-of-mass energies between 88 and 94 GeV. The data sample corresponds to an integrated e+e- luminosity of 40.4 pb-1 collected by the OPAL detector at LEP. The QED structure function F2 is extracted from a sample of 1462 γγ→μ+μ- events in which one photon is off the mass shell (single-tagged). The Q2 range for these massive photons is 4-400 GeV2, with an average Q2 of 8 GeV2. We have observed 48 e+e-→e+e-μ+ μ- events in which both final state electrons are detected. In the sample of single-tag events we have identified 34.9±6.7 events as due to the reaction γ;→τ+τ-, on an estimated background of 5.1±2.7 events. In all cases the measured event distributions agree with QED calculations.

Original languageEnglish
Pages (from-to)593-600
Number of pages8
JournalZeitschrift für Physik C Particles and Fields
Volume60
Issue number4
DOIs
Publication statusPublished - 1993 Dec

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Akers, R., Alexander, G., Allison, J., Anderson, K. J., Arcelli, S., Astbury, A., Axen, D., Azuelos, G., Baines, J. T. M., Ball, A. H., Banks, J., Barlow, R. J., Barnett, S., Bartoldus, R., Batley, J. R., Beaudoin, G., Beck, A., Beck, G. A., Becker, J., ... Zorn, G. T. (1993). A study of muon pair production and evidence for tau pair production in photon-photon collisions at LEP. Zeitschrift für Physik C Particles and Fields, 60(4), 593-600. https://doi.org/10.1007/BF01558388